diff --git a/litellm/cost_calculator.py b/litellm/cost_calculator.py
index 9b4dd80265c..0a8b960a9f3 100644
--- a/litellm/cost_calculator.py
+++ b/litellm/cost_calculator.py
@@ -350,7 +350,10 @@ def cost_per_token(  # noqa: PLR0915
             ):  # use region based pricing, if it's available
                 model_with_provider = model_with_provider_and_region
     else:
-        _, custom_llm_provider, _, _ = litellm.get_llm_provider(model=model)
+        try:
+            _, custom_llm_provider, _, _ = litellm.get_llm_provider(model=model)
+        except Exception:
+            return 0.0, 0.0
     model_without_prefix = model
     model_parts = model.split("/", 1)
     if len(model_parts) > 1:
@@ -545,9 +548,12 @@ def cost_per_token(  # noqa: PLR0915
             service_tier=service_tier,
         )
     else:
-        model_info = _cached_get_model_info_helper(
-            model=model, custom_llm_provider=custom_llm_provider
-        )
+        try:
+            model_info = _cached_get_model_info_helper(
+                model=model, custom_llm_provider=custom_llm_provider
+            )
+        except Exception:
+            return 0.0, 0.0
 
         if (model_info.get("input_cost_per_token") or 0.0) > 0 or (
             model_info.get("output_cost_per_token") or 0.0
diff --git a/tests/test_litellm/test_cost_calculator.py b/tests/test_litellm/test_cost_calculator.py
index e53484dd287..41b7d1395a6 100644
--- a/tests/test_litellm/test_cost_calculator.py
+++ b/tests/test_litellm/test_cost_calculator.py
@@ -13,6 +13,7 @@ from pydantic import BaseModel
 import litellm
 from litellm.cost_calculator import (
     completion_cost,
+    cost_per_token,
     handle_realtime_stream_cost_calculation,
     response_cost_calculator,
 )
@@ -2057,3 +2058,12 @@ def test_openrouter_gemini_3_1_flash_lite_preview_pricing():
     assert model_info["output_cost_per_token"] == 1.5e-06
     assert model_info["max_input_tokens"] == 1048576
     assert model_info["max_output_tokens"] == 65536
+
+
+def test_cost_per_token_returns_zero_for_unknown_model():
+    """
+    cost_per_token() must return (0.0, 0.0) for a model that is not in the
+    cost map instead of raising an exception (GitHub issue #27581).
+    """
+    result = cost_per_token(model="fake-model-xyz-123")
+    assert result == (0.0, 0.0)