diff --git a/litellm/cost_calculator.py b/litellm/cost_calculator.py
index 3910a554905..27e33174500 100644
--- a/litellm/cost_calculator.py
+++ b/litellm/cost_calculator.py
@@ -157,6 +157,7 @@ from litellm.utils import (
     CostPerToken,
     EmbeddingResponse,
     ImageResponse,
+    ModelInfoLookupMiss,
     ModelResponse,
     ModelResponseStream,
     ProviderConfigManager,
@@ -164,6 +165,7 @@ from litellm.utils import (
     TranscriptionResponse,
     cached_cost_map_key,
     cached_get_model_info_helper,
+    lookup_model_info_for_registration,
     mapped_model_fill_missing,
     model_info_with_pricing_overrides,
     runtime_model_cost_registrations,
@@ -519,6 +521,7 @@ def cost_per_token(
     request_model: str | None = None,  # original request model for router detection
     custom_model_info: OCRPricing | None = None,
     bedrock_model_info: ModelInfo | None = None,
+    deployment_model_info: ModelInfo | None = None,
 ) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens.
@@ -604,7 +607,7 @@ def cost_per_token(
         cached_tokens=_cache_read_tokens,
         cache_creation_tokens=_cache_creation_tokens,
         custom_cost_per_second=custom_cost_per_second,
-        custom_cost_per_token=custom_cost_per_token,
+        custom_cost_per_token=None if deployment_model_info is not None else custom_cost_per_token,
     )
 
     if response_cost is not None:
@@ -813,19 +816,27 @@ def cost_per_token(
             optional_params=(getattr(response, "_hidden_params", None) if response else None),
         )
     elif (
-        per_second_cost := _per_second_pricing_cost(
-            model=model,
-            custom_llm_provider=custom_llm_provider,
-            response_time_ms=response_time_ms,
-            audio_seconds=audio_transcription_file_duration,
+        deployment_model_info is None
+        and (
+            per_second_cost := _per_second_pricing_cost(
+                model=model,
+                custom_llm_provider=custom_llm_provider,
+                response_time_ms=response_time_ms,
+                audio_seconds=audio_transcription_file_duration,
+            )
         )
-    ) is not None:
+        is not None
+    ):
         return per_second_cost
     elif custom_llm_provider == "vertex_ai":
-        cost_router: Final = google_cost_router(
-            model=model_without_prefix,
-            custom_llm_provider=custom_llm_provider,
-            call_type=call_type,
+        cost_router: Final = (
+            "cost_per_token"
+            if deployment_model_info is not None
+            else google_cost_router(
+                model=model_without_prefix,
+                custom_llm_provider=custom_llm_provider,
+                call_type=call_type,
+            )
         )
         if cost_router == "cost_per_character":
             return google_cost_per_character(
@@ -844,11 +855,16 @@ def cost_per_token(
                 usage=usage_block,
                 service_tier=service_tier,
                 vertex_location=vertex_location,
+                deployment_model_info=deployment_model_info,
             )
     elif custom_llm_provider == "anthropic":
-        return anthropic_cost_per_token(model=model, usage=usage_block, service_tier=service_tier)
+        return anthropic_cost_per_token(
+            model=model, usage=usage_block, service_tier=service_tier, model_info=deployment_model_info
+        )
     elif custom_llm_provider == "bedrock":
-        resolved_bedrock_info: Final = bedrock_model_info or _bedrock_pricing_info(model, None, "bedrock", False)
+        resolved_bedrock_info: Final = (
+            deployment_model_info or bedrock_model_info or _bedrock_pricing_info(model, None, "bedrock", False)
+        )
         if resolved_bedrock_info is not None:
             return generic_cost_per_token(
                 model=model,
@@ -864,36 +880,47 @@ def cost_per_token(
             usage=usage_block,
             service_tier=service_tier,
             data_residency=data_residency,
+            model_info=deployment_model_info,
         )
     elif custom_llm_provider == "databricks":
-        return databricks_cost_per_token(model=model, usage=usage_block, service_tier=service_tier)
+        return databricks_cost_per_token(
+            model=model, usage=usage_block, service_tier=service_tier, model_info=deployment_model_info
+        )
     elif custom_llm_provider == "fireworks_ai":
-        return fireworks_ai_cost_per_token(model=model, usage=usage_block)
+        return fireworks_ai_cost_per_token(model=model, usage=usage_block, deployment_model_info=deployment_model_info)
     elif custom_llm_provider == "azure":
         return azure_openai_cost_per_token(
             model=model,
             usage=usage_block,
             response_time_ms=response_time_ms,
             service_tier=service_tier,
+            model_info=deployment_model_info,
         )
     elif custom_llm_provider == "gemini":
-        return gemini_cost_per_token(model=model, usage=usage_block, service_tier=service_tier)
+        return gemini_cost_per_token(
+            model=model, usage=usage_block, service_tier=service_tier, model_info=deployment_model_info
+        )
     elif custom_llm_provider == "deepseek":
-        return deepseek_cost_per_token(model=model, usage=usage_block)
+        return deepseek_cost_per_token(model=model, usage=usage_block, model_info=deployment_model_info)
     elif custom_llm_provider == "tencent":
-        return tencent_cost_per_token(model=model, usage=usage_block)
+        return tencent_cost_per_token(model=model, usage=usage_block, model_info=deployment_model_info)
     elif custom_llm_provider == "perplexity":
-        return perplexity_cost_per_token(model=model, usage=usage_block)
+        return perplexity_cost_per_token(model=model, usage=usage_block, deployment_model_info=deployment_model_info)
     elif custom_llm_provider == "xai":
-        return xai_cost_per_token(model=model, usage=usage_block)
+        return xai_cost_per_token(model=model, usage=usage_block, model_info=deployment_model_info)
     elif custom_llm_provider == "lemonade":
-        return lemonade_cost_per_token(model=model, usage=usage_block)
+        return lemonade_cost_per_token(model=model, usage=usage_block, model_info=deployment_model_info)
     elif custom_llm_provider in ("dashscope", "qwencloud", "qwen_ai_platform"):
         from litellm.llms.dashscope.cost_calculator import (
             cost_per_token as dashscope_cost_per_token,
         )
 
-        return dashscope_cost_per_token(model=model, usage=usage_block, custom_llm_provider=custom_llm_provider)
+        return dashscope_cost_per_token(
+            model=model,
+            usage=usage_block,
+            custom_llm_provider=custom_llm_provider,
+            deployment_model_info=deployment_model_info,
+        )
     elif custom_llm_provider == "azure_ai":
         return azure_ai_cost_per_token(
             model=model,
@@ -901,16 +928,22 @@ def cost_per_token(
             response_time_ms=response_time_ms,
             request_model=request_model,
             service_tier=service_tier,
+            model_info=deployment_model_info,
         )
     else:
-        model_info: Final = cached_get_model_info_helper(model=model, custom_llm_provider=custom_llm_provider)
-        if _has_token_or_tiered_pricing(model_info):
+        model_info: Final = (
+            deployment_model_info
+            if deployment_model_info is not None
+            else cached_get_model_info_helper(model=model, custom_llm_provider=custom_llm_provider)
+        )
+        if deployment_model_info is not None or _has_token_or_tiered_pricing(model_info):
             return generic_cost_per_token(
                 model=model,
                 usage=usage_block,
                 custom_llm_provider=custom_llm_provider,
                 service_tier=service_tier,
                 data_residency=data_residency,
+                model_info=deployment_model_info,
             )
         verbose_logger.debug("No per-token, tiered, or per-second pricing for model=%s; cost is 0", model)
         return 0.0, 0.0
@@ -1858,9 +1891,20 @@ def completion_cost(
         cache_creation_input_tokens: int | None = None
         cache_read_input_tokens: int | None = None
         audio_transcription_file_duration: float = 0.0
+        deployment_token_info: Final = _deployment_token_model_info(
+            model,
+            custom_llm_provider,
+            litellm_logging_obj,
+            custom_pricing,
+            router_model_id,
+            pricing_provider,
+            completion_response,
+        )
         provider_usage_object: Final = get_usage_object(completion_response=completion_response)
         cost_per_token_usage_object: Final[Usage | None] = (
-            _without_provider_stated_cost(provider_usage_object) if custom_pricing else provider_usage_object
+            _without_provider_stated_cost(provider_usage_object)
+            if custom_pricing or deployment_token_info is not None
+            else provider_usage_object
         )
         rerank_billed_units: RerankBilledUnits | None = None
 
@@ -1873,7 +1917,7 @@ def completion_cost(
                 served=_served_service_tier(completion_response, cost_per_token_usage_object),
             )
 
-        explicit_pricing: Final = custom_pricing is True or base_model is not None
+        explicit_pricing: Final = custom_pricing is True or base_model is not None or deployment_token_info is not None
         caller_set_prices: Final = (
             explicit_pricing or custom_cost_per_token is not None or custom_cost_per_second is not None
         )
@@ -2323,6 +2367,7 @@ def completion_cost(
                     response=completion_response,
                     custom_model_info=_ocr_model_info(litellm_logging_obj, custom_pricing, router_model_id),
                     bedrock_model_info=bedrock_model_info,
+                    deployment_model_info=deployment_token_info,
                 )
 
                 # Get additional costs from provider (e.g., routing fees, infrastructure costs)
@@ -2413,8 +2458,8 @@ def completion_cost(
                             service_tier=service_tier,
                             data_residency=data_residency,
                             vertex_location=vertex_location,
-                            custom_cost_per_token=custom_cost_per_token,
-                            model_info=bedrock_model_info,
+                            custom_cost_per_token=None if deployment_token_info is not None else custom_cost_per_token,
+                            model_info=deployment_token_info or bedrock_model_info,
                         )
                         _reasoning_cost = _token_type_breakdown.reasoning_cost
                         _cache_read_cost = _token_type_breakdown.cache_read_cost
@@ -2561,7 +2606,20 @@ def response_cost_calculator(
                         getattr(response_object, HIDDEN_PARAMS_ATTR),
                     )
                     provider_response_cost: Final = get_response_cost_from_hidden_params(hidden_params)
-                    if provider_response_cost is not None and not custom_pricing:
+                    if (
+                        provider_response_cost is not None
+                        and not custom_pricing
+                        and _deployment_token_model_info(
+                            model,
+                            custom_llm_provider,
+                            litellm_logging_obj,
+                            custom_pricing,
+                            router_model_id,
+                            pricing_provider,
+                            response_object,
+                        )
+                        is None
+                    ):
                         if _breakdown_total(litellm_logging_obj) != provider_response_cost:
                             header_priced_model: Final = select_model_name_for_cost_calc(
                                 model=model,
@@ -2680,6 +2738,65 @@ def _deployment_model_info(
     )
 
 
+def _deployment_token_model_info(
+    model: str | None,
+    custom_llm_provider: str | None,
+    litellm_logging_obj: LitellmLoggingObject | None,
+    custom_pricing: bool | None,
+    router_model_id: str | None,
+    pricing_provider: str | None = None,
+    response: object | None = None,
+) -> ModelInfo | None:
+    if router_model_id is None:
+        return None
+    registration: Final = next(
+        (
+            entry
+            for key, entry in runtime_model_cost_registrations(router_model_id, custom_llm_provider or "")
+            if key == router_model_id
+        ),
+        None,
+    )
+    if not custom_pricing and (registration is None or not _has_deployment_token_pricing(registration)):
+        return None
+    deployment_info: Final = _deployment_model_info(litellm_logging_obj, True, router_model_id)
+    if deployment_info is None:
+        return None
+    if not _has_deployment_token_pricing(deployment_info):
+        return None
+    if litellm_logging_obj is not None and litellm_logging_obj.spilled_over_ptu_for(response):
+        return None
+    if model is None:
+        return deployment_info
+    prefix: Final = model.partition("/")[0]
+    public_provider: Final = pricing_provider or (prefix if prefix in LlmProvidersSet else custom_llm_provider)
+    public_info: Final = lookup_model_info_for_registration(model, public_provider)
+    if isinstance(public_info, ModelInfoLookupMiss):
+        return deployment_info
+    public_entry: Final = _raw_cost_map_entry(public_info["key"])
+    if public_entry is None or not (
+        _cost_map_entry_prices_anything(public_entry) or _has_deployment_token_pricing(public_entry)
+    ):
+        return deployment_info
+    effective_info: Final = model_info_with_pricing_overrides(
+        {**public_info, "mode": public_info.get("mode") or "chat"}, deployment_info
+    )
+    off_peak: Final = deployment_info.get("off_peak_pricing")
+    return {
+        **effective_info,
+        "off_peak_pricing": off_peak if off_peak is not None else effective_info.get("off_peak_pricing"),
+    }
+
+
+def _has_deployment_token_pricing(info: Mapping[str, object]) -> bool:
+    return any(
+        value is not None
+        and ("token" in field or field in ("tiered_pricing", "off_peak_pricing"))
+        and (is_server_derived_pricing_key(field) or field == "off_peak_pricing")
+        for field, value in info.items()
+    )
+
+
 def _ocr_model_info(
     litellm_logging_obj: LitellmLoggingObject | None,
     custom_pricing: bool | None,
diff --git a/litellm/llms/azure/cost_calculation.py b/litellm/llms/azure/cost_calculation.py
index 057e9dbb9d9..82cf6b2749a 100644
--- a/litellm/llms/azure/cost_calculation.py
+++ b/litellm/llms/azure/cost_calculation.py
@@ -4,7 +4,7 @@ Helper util for handling azure openai-specific cost calculation
 """
 
 from litellm.litellm_core_utils.llm_cost_calc.utils import generic_cost_per_token
-from litellm.types.utils import Usage
+from litellm.types.utils import ModelInfo, Usage
 
 
 def cost_per_token(
@@ -12,6 +12,7 @@ def cost_per_token(
     usage: Usage,
     response_time_ms: float | None = 0.0,
     service_tier: str | None = None,
+    model_info: ModelInfo | None = None,
 ) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens.
@@ -30,4 +31,5 @@ def cost_per_token(
         usage=usage,
         custom_llm_provider="azure",
         service_tier=service_tier,
+        model_info=model_info,
     )
diff --git a/litellm/llms/azure_ai/cost_calculator.py b/litellm/llms/azure_ai/cost_calculator.py
index 5934525eca3..5c12dfd0226 100644
--- a/litellm/llms/azure_ai/cost_calculator.py
+++ b/litellm/llms/azure_ai/cost_calculator.py
@@ -7,7 +7,7 @@ from typing import Final
 
 from litellm._logging import verbose_logger
 from litellm.litellm_core_utils.llm_cost_calc.utils import generic_cost_per_token
-from litellm.types.utils import Usage
+from litellm.types.utils import ModelInfo, Usage
 from litellm.utils import get_model_info
 
 
@@ -63,10 +63,12 @@ def calculate_azure_model_router_flat_cost(model: str, prompt_tokens: int) -> fl
     return 0.0
 
 
-def _response_model_cost(model: str, usage: Usage, service_tier: str | None) -> tuple[float, float]:
+def _response_model_cost(
+    model: str, usage: Usage, service_tier: str | None, model_info: ModelInfo | None
+) -> tuple[float, float]:
     try:
         return generic_cost_per_token(
-            model=model, usage=usage, custom_llm_provider="azure_ai", service_tier=service_tier
+            model=model, usage=usage, custom_llm_provider="azure_ai", service_tier=service_tier, model_info=model_info
         )
     except Exception as e:
         if not is_azure_model_router(model):
@@ -93,6 +95,7 @@ def cost_per_token(
     response_time_ms: float | None = 0.0,
     request_model: str | None = None,
     service_tier: str | None = None,
+    model_info: ModelInfo | None = None,
 ) -> tuple[float, float]:
     """
     Price the response model's own tokens for Azure AI, plus the Model Router fee exactly once when either the
@@ -111,6 +114,7 @@ def cost_per_token(
         response_time_ms: Optional response time in milliseconds
         request_model: Optional[str], the original request model name; a Model Router name adds the routing fee
         service_tier: Optional service tier the request was priced on
+        model_info: Optional resolved deployment prices
 
     Returns:
         Tuple[float, float] - prompt_cost_in_usd, completion_cost_in_usd
@@ -118,7 +122,9 @@ def cost_per_token(
     Raises:
         ValueError: If a model that is not a Model Router name is missing from the cost map
     """
-    prompt_cost, completion_cost = _response_model_cost(model=model, usage=usage, service_tier=service_tier)
+    prompt_cost, completion_cost = _response_model_cost(
+        model=model, usage=usage, service_tier=service_tier, model_info=model_info
+    )
     fee_name: Final = _router_fee_name(model=model, request_model=request_model)
     if fee_name is None:
         return prompt_cost, completion_cost
diff --git a/litellm/llms/dashscope/cost_calculator.py b/litellm/llms/dashscope/cost_calculator.py
index 55d6fb1a0e2..33cc5daf81b 100644
--- a/litellm/llms/dashscope/cost_calculator.py
+++ b/litellm/llms/dashscope/cost_calculator.py
@@ -115,6 +115,7 @@ def cost_per_token(
     usage: Usage,
     custom_llm_provider: str = "dashscope",
     current_time: datetime | None = None,
+    deployment_model_info: ModelInfo | None = None,
 ) -> tuple[float, float]:
     """
     Calculate cost per token for Dashscope models.
@@ -127,11 +128,16 @@ def cost_per_token(
         usage: LiteLLM Usage block
         custom_llm_provider: The provider id the request resolved to; dashscope or one of its brand aliases
         current_time: The moment the request is billed at; defaults to now, UTC
+        deployment_model_info: Optional resolved deployment prices
 
     Returns:
         Tuple[float, float] - (prompt_cost_in_usd, completion_cost_in_usd)
     """
-    model_info: Final = get_model_info(model=model, custom_llm_provider=custom_llm_provider)
+    model_info: Final = (
+        deployment_model_info
+        if deployment_model_info is not None
+        else get_model_info(model=model, custom_llm_provider=custom_llm_provider)
+    )
     breakdown: Final = _extract_token_breakdown(usage)
     raw_tiers: Final = model_info.get("tiered_pricing")
     tiered_pricing: Final = raw_tiers if isinstance(raw_tiers, list) else None
diff --git a/litellm/llms/databricks/cost_calculator.py b/litellm/llms/databricks/cost_calculator.py
index 2bb5b99f0ad..984db4a2469 100644
--- a/litellm/llms/databricks/cost_calculator.py
+++ b/litellm/llms/databricks/cost_calculator.py
@@ -7,7 +7,7 @@ from types import MappingProxyType
 from typing import Final
 
 from litellm.litellm_core_utils.llm_cost_calc.utils import generic_cost_per_token
-from litellm.types.utils import Usage
+from litellm.types.utils import ModelInfo, Usage
 
 _LEGACY_ENDPOINT_NAMES: Final = MappingProxyType(
     {
@@ -30,7 +30,9 @@ def _registry_key(model: str) -> str:
     )
 
 
-def cost_per_token(model: str, usage: Usage, service_tier: str | None = None) -> tuple[float, float]:
+def cost_per_token(
+    model: str, usage: Usage, service_tier: str | None = None, model_info: ModelInfo | None = None
+) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens.
 
@@ -46,4 +48,5 @@ def cost_per_token(model: str, usage: Usage, service_tier: str | None = None) ->
         usage=usage,
         custom_llm_provider="databricks",
         service_tier=service_tier,
+        model_info=model_info,
     )
diff --git a/litellm/llms/deepseek/cost_calculator.py b/litellm/llms/deepseek/cost_calculator.py
index 5a0c065f0ee..339686c88f4 100644
--- a/litellm/llms/deepseek/cost_calculator.py
+++ b/litellm/llms/deepseek/cost_calculator.py
@@ -5,13 +5,13 @@ Handles prompt caching scenario.
 """
 
 from litellm.litellm_core_utils.llm_cost_calc.utils import generic_cost_per_token
-from litellm.types.utils import Usage
+from litellm.types.utils import ModelInfo, Usage
 
 
-def cost_per_token(model: str, usage: Usage) -> tuple[float, float]:
+def cost_per_token(model: str, usage: Usage, model_info: ModelInfo | None = None) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens.
 
     Follows the same logic as Anthropic's cost per token calculation.
     """
-    return generic_cost_per_token(model=model, usage=usage, custom_llm_provider="deepseek")
+    return generic_cost_per_token(model=model, usage=usage, custom_llm_provider="deepseek", model_info=model_info)
diff --git a/litellm/llms/fireworks_ai/cost_calculator.py b/litellm/llms/fireworks_ai/cost_calculator.py
index d42b4ddbbf7..e6f144aa225 100644
--- a/litellm/llms/fireworks_ai/cost_calculator.py
+++ b/litellm/llms/fireworks_ai/cost_calculator.py
@@ -71,7 +71,9 @@ def _resolve_routed_model_info(model: str) -> ModelInfo:
         return get_model_info(model=base_model, custom_llm_provider="fireworks_ai")
 
 
-def cost_per_token(model: str, usage: Usage, current_time: datetime | None = None) -> tuple[float, float]:
+def cost_per_token(
+    model: str, usage: Usage, current_time: datetime | None = None, deployment_model_info: ModelInfo | None = None
+) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens,
     swapping in the model's off_peak_pricing rates while one of its windows is open.
@@ -84,11 +86,11 @@ def cost_per_token(model: str, usage: Usage, current_time: datetime | None = Non
     Returns:
         Tuple[float, float] - prompt_cost_in_usd, completion_cost_in_usd
     """
-    model_info: Final = _resolve_model_info(model)
+    model_info: Final = deployment_model_info if deployment_model_info is not None else _resolve_model_info(model)
     return generic_cost_per_token(
         model=model,
         usage=usage,
-        custom_llm_provider=model_info["litellm_provider"],
+        custom_llm_provider="fireworks_ai" if deployment_model_info is not None else model_info["litellm_provider"],
         model_info=model_info,
         current_time=current_time,
     )
diff --git a/litellm/llms/gemini/cost_calculator.py b/litellm/llms/gemini/cost_calculator.py
index b82103b0ff8..6f08b1d06b6 100644
--- a/litellm/llms/gemini/cost_calculator.py
+++ b/litellm/llms/gemini/cost_calculator.py
@@ -10,7 +10,9 @@ if TYPE_CHECKING:
     from litellm.types.utils import ModelInfo, Usage
 
 
-def cost_per_token(model: str, usage: "Usage", service_tier: str | None = None) -> tuple[float, float]:
+def cost_per_token(
+    model: str, usage: "Usage", service_tier: str | None = None, model_info: "ModelInfo | None" = None
+) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens.
 
@@ -23,6 +25,7 @@ def cost_per_token(model: str, usage: "Usage", service_tier: str | None = None)
         usage=usage,
         custom_llm_provider="gemini",
         service_tier=service_tier,
+        model_info=model_info,
     )
 
 
diff --git a/litellm/llms/lemonade/cost_calculator.py b/litellm/llms/lemonade/cost_calculator.py
index b9e8b79c1a1..b442b23de47 100644
--- a/litellm/llms/lemonade/cost_calculator.py
+++ b/litellm/llms/lemonade/cost_calculator.py
@@ -7,28 +7,33 @@ This prevents cost calculation errors when using models not in model_prices_and_
 
 from typing import Final
 
-from litellm.types.utils import Usage
+from litellm.litellm_core_utils.llm_cost_calc.utils import generic_cost_per_token
+from litellm.types.utils import ModelInfo, Usage
 
 
 def cost_per_token(
     model: str,
     usage: Usage,
+    model_info: ModelInfo | None = None,
 ) -> tuple[float, float]:
     """
-    Calculate cost per token for Lemonade models.
+    Calculate configured token costs, or return zero for unpriced Lemonade models.
 
-    Since Lemonade is a local/self-hosted deployment, there are no per-token costs.
-    This function returns (0.0, 0.0) for all models to allow cost tracking to work
-    without errors for any Lemonade model, regardless of whether it's in the
+    Since Lemonade is a local/self-hosted deployment, unpriced models have no per-token costs.
+    This function returns (0.0, 0.0) for those models, regardless of whether they are in the
     model_prices_and_context_window.json file.
 
     Args:
         model: The model name (with or without "lemonade/" prefix)
         usage: Usage object containing token counts
+        model_info: Optional resolved deployment prices
 
     Returns:
-        Tuple of (prompt_cost, completion_cost) - always (0.0, 0.0) for Lemonade
+        Tuple of (prompt_cost, completion_cost)
     """
+    if model_info is not None:
+        return generic_cost_per_token(model=model, usage=usage, custom_llm_provider="lemonade", model_info=model_info)
+
     # Lemonade is self-hosted/local, so cost is always 0
     prompt_cost: Final = 0.0
     completion_cost: Final = 0.0
diff --git a/litellm/llms/openai/cost_calculation.py b/litellm/llms/openai/cost_calculation.py
index bc8aaab3185..c20d7d7b0f8 100644
--- a/litellm/llms/openai/cost_calculation.py
+++ b/litellm/llms/openai/cost_calculation.py
@@ -24,6 +24,7 @@ def cost_per_token(
     usage: Usage,
     service_tier: str | None = None,
     data_residency: str | None = None,
+    model_info: ModelInfo | None = None,
 ) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens.
@@ -44,6 +45,7 @@ def cost_per_token(
         custom_llm_provider="openai",
         service_tier=service_tier,
         data_residency=data_residency,
+        model_info=model_info,
     )
 
 
diff --git a/litellm/llms/perplexity/cost_calculator.py b/litellm/llms/perplexity/cost_calculator.py
index c40a86b221b..2c8f2a305fe 100644
--- a/litellm/llms/perplexity/cost_calculator.py
+++ b/litellm/llms/perplexity/cost_calculator.py
@@ -8,11 +8,13 @@ from typing import Final
 
 from litellm.litellm_core_utils.core_helpers import finite_reported_cost
 from litellm.litellm_core_utils.llm_cost_calc.utils import TokenRates, apply_off_peak_pricing
-from litellm.types.utils import Usage
+from litellm.types.utils import ModelInfo, Usage
 from litellm.utils import get_model_info
 
 
-def cost_per_token(model: str, usage: Usage, current_time: datetime | None = None) -> tuple[float, float]:
+def cost_per_token(
+    model: str, usage: Usage, current_time: datetime | None = None, deployment_model_info: ModelInfo | None = None
+) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens.
     The manual fallback swaps in the model's off_peak_pricing rates while one of its windows is open.
@@ -35,13 +37,19 @@ def cost_per_token(model: str, usage: Usage, current_time: datetime | None = Non
         total_cost = cost_info.get("total_cost")
     elif isinstance(cost_info, (int, float)) and not isinstance(cost_info, bool):
         total_cost = float(cost_info)
-    reported_cost: Final = None if total_cost is None else finite_reported_cost(float(total_cost))
+    reported_cost: Final = (
+        None if total_cost is None or deployment_model_info is not None else finite_reported_cost(float(total_cost))
+    )
     if reported_cost is not None:
         return (0.0, reported_cost)
 
     ## FALLBACK: Calculate cost manually if Perplexity doesn't provide it
     ## GET MODEL INFO
-    model_info: Final = get_model_info(model=model, custom_llm_provider="perplexity")
+    model_info: Final = (
+        deployment_model_info
+        if deployment_model_info is not None
+        else get_model_info(model=model, custom_llm_provider="perplexity")
+    )
 
     def _safe_float_cast(value: str | float | None | object, default: float = 0.0) -> float:
         """Safely cast a value to float with proper type handling for mypy."""
diff --git a/litellm/llms/tencent/cost_calculator.py b/litellm/llms/tencent/cost_calculator.py
index 5d2abe3acf4..523074446fc 100644
--- a/litellm/llms/tencent/cost_calculator.py
+++ b/litellm/llms/tencent/cost_calculator.py
@@ -9,8 +9,8 @@ from litellm.litellm_core_utils.llm_cost_calc.utils import (
 from litellm.types.utils import ImageResponse, ModelInfo, Usage
 
 
-def cost_per_token(model: str, usage: Usage) -> tuple[float, float]:
-    return generic_cost_per_token(model=model, usage=usage, custom_llm_provider="tencent")
+def cost_per_token(model: str, usage: Usage, model_info: ModelInfo | None = None) -> tuple[float, float]:
+    return generic_cost_per_token(model=model, usage=usage, custom_llm_provider="tencent", model_info=model_info)
 
 
 def _deployment_image_token_pricing(model_info: ModelInfo | None) -> ModelInfo | None:
diff --git a/litellm/llms/vertex_ai/cost_calculator.py b/litellm/llms/vertex_ai/cost_calculator.py
index 864619f91b0..c1eb639291f 100644
--- a/litellm/llms/vertex_ai/cost_calculator.py
+++ b/litellm/llms/vertex_ai/cost_calculator.py
@@ -207,6 +207,7 @@ def cost_per_token(
     usage: Usage,
     service_tier: str | None = None,
     vertex_location: str | None = None,
+    deployment_model_info: ModelInfo | None = None,
 ) -> tuple[float, float]:
     """
     Calculates the cost per token for a given model, prompt tokens, and completion tokens.
@@ -229,7 +230,11 @@ def cost_per_token(
     """
 
     ## GET MODEL INFO
-    model_info: Final = litellm.get_model_info(model=model, custom_llm_provider=custom_llm_provider)
+    model_info: Final = (
+        deployment_model_info
+        if deployment_model_info is not None
+        else litellm.get_model_info(model=model, custom_llm_provider=custom_llm_provider)
+    )
 
     ## HANDLE 128k+ PRICING
     input_cost_per_token_above_128k_tokens: Final = model_info.get("input_cost_per_token_above_128k_tokens")
@@ -248,4 +253,5 @@ def cost_per_token(
         usage=usage,
         service_tier=service_tier,
         vertex_location=vertex_location,
+        model_info=model_info,
     )
diff --git a/litellm/llms/xai/cost_calculator.py b/litellm/llms/xai/cost_calculator.py
index aec535c2086..25c328bc2b0 100644
--- a/litellm/llms/xai/cost_calculator.py
+++ b/litellm/llms/xai/cost_calculator.py
@@ -62,7 +62,7 @@ def _split_reported_cost(model: str, usage: Usage, reported_cost: float) -> tupl
     return input_cost, reported_cost - input_cost
 
 
-def cost_per_token(model: str, usage: Usage) -> tuple[float, float]:
+def cost_per_token(model: str, usage: Usage, model_info: "ModelInfo | None" = None) -> tuple[float, float]:
     """
     Calculates the cost per token for a given XAI model, prompt tokens, and completion tokens.
     Uses the generic cost calculator for all pricing logic, with XAI-specific reasoning token handling.
@@ -74,13 +74,13 @@ def cost_per_token(model: str, usage: Usage) -> tuple[float, float]:
     Returns:
         Tuple[float, float] - prompt_cost_in_usd, completion_cost_in_usd
     """
-    reported_cost: Final = _cost_reported_by_xai(usage)
+    reported_cost: Final = _cost_reported_by_xai(usage) if model_info is None else None
     if reported_cost is not None:
         return _split_reported_cost(model, usage, reported_cost)
-    return _token_math_cost_per_token(model, usage)
+    return _token_math_cost_per_token(model, usage, model_info)
 
 
-def _token_math_cost_per_token(model: str, usage: Usage) -> tuple[float, float]:
+def _token_math_cost_per_token(model: str, usage: Usage, model_info: "ModelInfo | None" = None) -> tuple[float, float]:
     # XAI-specific completion cost: completion is billed as visible + reasoning
     # tokens. Detect when the transformation layer already folded them so we
     # don't double-count; fall back to raw xAI shape for callers that bypass
@@ -105,7 +105,9 @@ def _token_math_cost_per_token(model: str, usage: Usage) -> tuple[float, float]:
         completion_tokens_details=None,
     )
 
-    prompt_cost, completion_cost = generic_cost_per_token(model=model, usage=modified_usage, custom_llm_provider="xai")
+    prompt_cost, completion_cost = generic_cost_per_token(
+        model=model, usage=modified_usage, custom_llm_provider="xai", model_info=model_info
+    )
 
     return prompt_cost, completion_cost
 
diff --git a/tests/unit/test_cost_calculator.py b/tests/unit/test_cost_calculator.py
index 49d51e99790..68d2452f30d 100644
--- a/tests/unit/test_cost_calculator.py
+++ b/tests/unit/test_cost_calculator.py
@@ -3,6 +3,7 @@ import asyncio
 import datetime
 import time
 from collections.abc import Iterator, Mapping
+from itertools import product
 from types import MappingProxyType, SimpleNamespace
 from typing import Final, Literal, cast
 
@@ -9650,6 +9651,294 @@ def isolated_pricing_registry(local_model_cost_map: None, monkeypatch: pytest.Mo
     monkeypatch.setattr(litellm, "models_by_provider", dict(litellm.models_by_provider))
 
 
+@pytest.mark.parametrize(
+    ("adapter", "pricing"),
+    tuple(product(
+        ("anthropic", "openai", "azure", "azure_ai", "gemini", "databricks", "bedrock", "vertex_ai", "bigmodel"),
+        ("flat", "zero", "off_peak", "priority", "tiered"),
+    )) + tuple(product(
+        ("deepseek", "tencent", "fireworks_ai", "xai", "dashscope", "lemonade"),
+        ("flat", "zero", "off_peak", "tiered"),
+    )),
+)
+@pytest.mark.parametrize("legacy_flat_price", (False, True))
+@pytest.mark.parametrize("custom_pricing", (False, True))
+@pytest.mark.usefixtures("isolated_pricing_registry")
+def test_selected_deployment_prices_survive_transport_provider_changes(
+    adapter: str, pricing: str, legacy_flat_price: bool, custom_pricing: bool
+) -> None:
+    from litellm._internal_context import pinned_billing_time
+
+    deployment_id: Final = "transport-pricing-deployment"
+    rates: Final = {
+        "input_cost_per_token": 0.001,
+        "output_cost_per_token": 0.002,
+        "cache_read_input_token_cost": 0.0001,
+        "cache_creation_input_token_cost": 0.00125,
+    }
+    effective_rates: Final = (
+        {field: 0.0 for field in rates}
+        if pricing == "zero"
+        else {field: rate / 2 for field, rate in rates.items()}
+        if pricing == "off_peak"
+        else {field: rate * 2 for field, rate in rates.items()}
+        if pricing in ("priority", "tiered")
+        else rates
+    )
+    entry: Final = {
+        **(effective_rates if pricing == "zero" else rates),
+        **({"off_peak_pricing": {"hours_utc": "00:00-00:00", **effective_rates}} if pricing == "off_peak" else {}),
+        **({f"{field}_priority": rate for field, rate in effective_rates.items()} if pricing == "priority" else {}),
+        **({"tiered_pricing": [{"range": [0, 100], **effective_rates}]} if pricing == "tiered" else {}),
+        "mode": "chat",
+    }
+    response: Final = ModelResponse(
+        model="unmapped-upstream-model",
+        usage=Usage(
+            prompt_tokens=40,
+            completion_tokens=1,
+            total_tokens=41,
+            prompt_tokens_details=PromptTokensDetailsWrapper(text_tokens=24, cached_tokens=10, cache_creation_tokens=6),
+        ),
+    )
+    expected_input: Final = (
+        24 * effective_rates["input_cost_per_token"]
+        + 10 * effective_rates["cache_read_input_token_cost"]
+        + 6 * effective_rates["cache_creation_input_token_cost"]
+    )
+    expected_output: Final = effective_rates["output_cost_per_token"]
+    for provider in ("deepseek", adapter, "deepseek"):
+        litellm.register_model({deployment_id: {**entry, "litellm_provider": provider}})
+        logging_obj: Final = Logging(
+            model="deepseek/unmapped-upstream-model",
+            messages=[],
+            stream=False,
+            call_type="completion",
+            start_time=datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc),
+            litellm_call_id="transport-pricing",
+            function_id="transport-pricing",
+        )
+        with pinned_billing_time(datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc)):
+            cost: Final = response_cost_calculator(
+                response_object=response,
+                model="deepseek/unmapped-upstream-model",
+                custom_llm_provider=adapter,
+                call_type="completion",
+                optional_params={},
+                custom_pricing=custom_pricing,
+                custom_cost_per_token=(
+                    {"input_cost_per_token": rates["input_cost_per_token"], "output_cost_per_token": rates["output_cost_per_token"]}
+                    if legacy_flat_price
+                    else None
+                ),
+                router_model_id=deployment_id,
+                service_tier="priority" if pricing == "priority" else None,
+                litellm_logging_obj=logging_obj,
+            )
+        assert cost == pytest.approx(expected_input + expected_output)
+        assert logging_obj.cost_breakdown["input_cost"] == pytest.approx(expected_input)
+        assert logging_obj.cost_breakdown["output_cost"] == pytest.approx(expected_output)
+        assert logging_obj.cost_breakdown.get("cache_read_cost", 0.0) == pytest.approx(10 * effective_rates["cache_read_input_token_cost"])
+        assert logging_obj.cost_breakdown.get("cache_creation_cost", 0.0) == pytest.approx(6 * effective_rates["cache_creation_input_token_cost"])
+        assert litellm.model_cost[deployment_id]["litellm_provider"] == provider
+        if provider != adapter and adapter in ("openai", "anthropic"):
+            with pytest.raises(litellm.ModelNotMappedError, match="isn't mapped yet"):
+                litellm.get_model_info(model=deployment_id, custom_llm_provider=adapter)
+
+
+@pytest.mark.parametrize("field", ("input_cost_per_token", "output_cost_per_token", "cache_read_input_token_cost"))
+@pytest.mark.parametrize("rate", (0.0, 0.001))
+@pytest.mark.usefixtures("isolated_pricing_registry")
+def test_deployment_partial_prices_keep_public_rates_and_sibling_isolation(field: str, rate: float) -> None:
+    public_model: Final = "openai/owned-public-pricing-model"
+    public_rates: Final = {
+        "input_cost_per_token": 0.005,
+        "output_cost_per_token": 0.008,
+        "cache_read_input_token_cost": 0.0005,
+        "cache_creation_input_token_cost": 0.00625,
+    }
+    litellm.register_model({public_model: {**public_rates, "litellm_provider": "openai", "mode": "chat"}})
+    router: Final = litellm.Router(
+        model_list=[
+            {
+                "model_name": "partial-priced",
+                "litellm_params": {"model": public_model, "api_key": "fake-key", field: rate},
+                "model_info": {"id": "partial-price-deployment"},
+            },
+            {
+                "model_name": "public-priced",
+                "litellm_params": {"model": public_model, "api_key": "fake-key"},
+                "model_info": {"id": "public-price-deployment"},
+            },
+        ]
+    )
+    assert len(router.model_list) == 2
+    response: Final = ModelResponse(
+        model=public_model,
+        usage=Usage(
+            prompt_tokens=10,
+            completion_tokens=5,
+            total_tokens=15,
+            prompt_tokens_details=PromptTokensDetailsWrapper(text_tokens=4, cached_tokens=4, cache_creation_tokens=2),
+        ),
+    )
+    effective_rates: Final = {**public_rates, field: rate}
+    assert completion_cost(
+        completion_response=response,
+        model=public_model,
+        custom_llm_provider="openai",
+        custom_pricing=True,
+        router_model_id="partial-price-deployment",
+    ) == pytest.approx(
+        4 * effective_rates["input_cost_per_token"]
+        + 4 * effective_rates["cache_read_input_token_cost"]
+        + 2 * effective_rates["cache_creation_input_token_cost"]
+        + 5 * effective_rates["output_cost_per_token"]
+    )
+    for deployment_id, selected_rates in (
+        ("partial-price-deployment", effective_rates),
+        ("public-price-deployment", public_rates),
+    ):
+        assert completion_cost(
+            completion_response=response,
+            model=public_model,
+            custom_llm_provider="openai",
+            custom_pricing=False,
+            router_model_id=deployment_id,
+        ) == pytest.approx(
+            4 * selected_rates["input_cost_per_token"]
+            + 4 * selected_rates["cache_read_input_token_cost"]
+            + 2 * selected_rates["cache_creation_input_token_cost"]
+            + 5 * selected_rates["output_cost_per_token"]
+        )
+
+
+@pytest.mark.parametrize("pricing", ("input", "zero", "cache", "complete", "off_peak"))
+@pytest.mark.parametrize("prefixed_model", (False, True))
+@pytest.mark.parametrize("custom_pricing", (False, True))
+@pytest.mark.usefixtures("isolated_pricing_registry")
+def test_deployment_prices_fill_only_missing_components_from_the_pricing_provider(
+    pricing: str, prefixed_model: bool, custom_pricing: bool, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    from litellm._internal_context import pinned_billing_time
+
+    public_model: Final = "owned-partial-pricing-model"
+    public_rates: Final = {
+        "input_cost_per_token": 0.005,
+        "output_cost_per_token": 0.008,
+        "cache_read_input_token_cost": 0.0005,
+        "cache_creation_input_token_cost": 0.00625,
+    }
+    monkeypatch.setitem(litellm.model_cost, f"deepseek/{public_model}", {**public_rates, "litellm_provider": "deepseek", "mode": "chat"})
+    monkeypatch.setitem(litellm.model_cost, f"anthropic/{public_model}", {**{field: value * 10 for field, value in public_rates.items()}, "litellm_provider": "anthropic", "mode": "chat"})
+    overrides: Final = (
+        {"input_cost_per_token": 0.001, "output_cost_per_token": 0.002}
+        if pricing == "complete"
+        else {"cache_read_input_token_cost": 0.0001}
+        if pricing == "cache"
+        else {"input_cost_per_token": 0.0 if pricing == "zero" else 0.001}
+        if pricing != "off_peak"
+        else {}
+    )
+    off_peak_rates: Final = {field: value / 2 for field, value in public_rates.items()}
+    effective_rates: Final = off_peak_rates if pricing == "off_peak" else {**public_rates, **overrides}
+    deployment_id: Final = "owned-partial-price-deployment"
+    litellm.register_model({deployment_id: {
+        **overrides,
+        **({"off_peak_pricing": {"hours_utc": "00:00-00:00", **off_peak_rates}} if pricing == "off_peak" else {}),
+        "litellm_provider": "deepseek",
+        "mode": "chat",
+    }})
+    response: Final = ModelResponse(model=public_model, usage=Usage(
+        prompt_tokens=10,
+        completion_tokens=5,
+        total_tokens=15,
+        prompt_tokens_details=PromptTokensDetailsWrapper(text_tokens=4, cached_tokens=4, cache_creation_tokens=2),
+        cost=99.0,
+    ))
+    response._hidden_params["response_cost"] = 99.0
+    with pinned_billing_time(datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc)):
+        cost: Final = response_cost_calculator(
+            response_object=response,
+            model=f"deepseek/{public_model}" if prefixed_model else public_model,
+            custom_llm_provider="anthropic",
+            pricing_provider=None if prefixed_model else "deepseek",
+            router_model_id=deployment_id,
+            custom_pricing=custom_pricing,
+            call_type="completion",
+            optional_params={},
+        )
+    assert cost == pytest.approx(
+        4 * effective_rates["input_cost_per_token"]
+        + 4 * effective_rates["cache_read_input_token_cost"]
+        + 2 * effective_rates["cache_creation_input_token_cost"]
+        + 5 * effective_rates["output_cost_per_token"]
+    )
+    assert litellm.model_cost[f"deepseek/{public_model}"]["input_cost_per_token"] == public_rates["input_cost_per_token"]
+    assert litellm.model_cost[deployment_id]["litellm_provider"] == "deepseek"
+
+
+@pytest.mark.parametrize("custom_pricing", (False, True))
+@pytest.mark.usefixtures("isolated_pricing_registry")
+def test_perplexity_deployment_prices_keep_citation_reasoning_and_search_charges(custom_pricing: bool) -> None:
+    deployment_id: Final = "perplexity-deployment-pricing"
+    litellm.register_model({deployment_id: {
+        "input_cost_per_token": 0.001,
+        "output_cost_per_token": 0.002,
+        "output_cost_per_reasoning_token": 0.003,
+        "citation_cost_per_token": 0.004,
+        "search_queries_cost_per_query": 0.005,
+        "litellm_provider": "deepseek",
+        "mode": "chat",
+    }})
+    response: Final = ModelResponse(model="owned-perplexity-model", usage=Usage(
+        prompt_tokens=10, completion_tokens=5, total_tokens=15,
+        citation_tokens=3, reasoning_tokens=2, cost={"total_cost": 99.0},
+        prompt_tokens_details=PromptTokensDetailsWrapper(web_search_requests=2),
+    ))
+    assert completion_cost(
+        completion_response=response,
+        model="owned-perplexity-model",
+        custom_llm_provider="perplexity",
+        router_model_id=deployment_id,
+        custom_pricing=custom_pricing,
+    ) == pytest.approx(10 * 0.001 + 3 * 0.004 + 3 * 0.002 + 2 * 0.003 + 2 * 0.005)
+
+
+@pytest.mark.parametrize("pricing", ("off_peak", "priority", "tiered", "reasoning", "long_context"))
+@pytest.mark.usefixtures("isolated_pricing_registry")
+def test_deployment_flat_prices_override_public_rate_variants(pricing: str, monkeypatch: pytest.MonkeyPatch) -> None:
+    from litellm._internal_context import pinned_billing_time
+
+    public_model: Final = "deepseek/owned-public-rate-variants"
+    public_rates: Final = {"input_cost_per_token": 0.005, "output_cost_per_token": 0.008}
+    variant: Final = (
+        {"off_peak_pricing": {"hours_utc": "00:00-00:00", **public_rates}}
+        if pricing == "off_peak"
+        else {"tiered_pricing": [{"range": [0, 1000], **public_rates}]}
+        if pricing == "tiered"
+        else {"output_cost_per_reasoning_token": 0.01}
+        if pricing == "reasoning"
+        else {f"{field}_priority": rate for field, rate in public_rates.items()}
+        if pricing == "priority"
+        else {f"{field}_above_100_tokens": rate for field, rate in public_rates.items()}
+    )
+    monkeypatch.setitem(litellm.model_cost, public_model, {**public_rates, **variant, "litellm_provider": "deepseek", "mode": "chat"})
+    deployment_id: Final = "owned-flat-price-deployment"
+    litellm.register_model({deployment_id: {"input_cost_per_token": 0.001, "output_cost_per_token": 0.002, "litellm_provider": "deepseek", "mode": "chat"}})
+    response: Final = ModelResponse(model=public_model, usage=Usage(prompt_tokens=200, completion_tokens=20, total_tokens=220, completion_tokens_details=CompletionTokensDetailsWrapper(reasoning_tokens=5)))
+    with pinned_billing_time(datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc)):
+        cost: Final = completion_cost(
+            completion_response=response,
+            model=public_model,
+            custom_llm_provider="openai",
+            router_model_id=deployment_id,
+            custom_pricing=True,
+            service_tier="priority" if pricing == "priority" else None,
+        )
+    assert cost == pytest.approx(200 * 0.001 + 20 * 0.002)
+
+
 _CUSTOM_PRICING_MODEL: Final = "migration-custom-pricing-chat"
 _CUSTOM_PRICING_RATES: Final = MappingProxyType(
     {"input_cost_per_token": 0.0000008, "output_cost_per_token": 0.0000032}
@@ -9747,6 +10036,38 @@ def test_router_cache_only_pricing_preserves_uncached_token_charges(rate: float,
     assert response._hidden_params["response_cost"] == pytest.approx(_CUSTOM_PRICING_EXPECTED_COST)
 
 
+@pytest.mark.parametrize("async_mode", (False, True))
+@pytest.mark.asyncio
+@pytest.mark.usefixtures("isolated_pricing_registry")
+@respx.mock
+async def test_router_transport_calls_keep_deployment_off_peak_prices(async_mode: bool) -> None:
+    from litellm._internal_context import pinned_billing_time
+
+    respx.post("https://api.openai.com/v1/chat/completions").mock(side_effect=_custom_pricing_upstream)
+    discounted_rates: Final = {field: rate / 2 for field, rate in _CUSTOM_PRICING_RATES.items()}
+    router: Final = litellm.Router(
+        model_list=[
+            {
+                "model_name": "off-peak-deployment",
+                "litellm_params": {
+                    "model": f"openai/{_CUSTOM_PRICING_MODEL}",
+                    "api_key": "sk-test",
+                    **_CUSTOM_PRICING_RATES,
+                },
+                "model_info": {
+                    "id": "off-peak-deployment-id",
+                    "litellm_provider": "deepseek",
+                    "off_peak_pricing": {"hours_utc": "00:00-00:00", **discounted_rates},
+                },
+            }
+        ]
+    )
+    request: Final = {"model": "off-peak-deployment", "messages": [{"role": "user", "content": "How are you?"}]}
+    with pinned_billing_time(datetime.datetime(2026, 1, 1, tzinfo=datetime.timezone.utc)):
+        response: Final = await router.acompletion(**request) if async_mode else router.completion(**request)
+    assert response._hidden_params["response_cost"] == pytest.approx(_CUSTOM_PRICING_EXPECTED_COST / 2)
+
+
 @pytest.mark.usefixtures("isolated_pricing_registry")
 @respx.mock
 def test_streamed_custom_pricing_cost_matches_non_streamed_cost() -> None: