diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index 02c5cb7a6d1..79285aa0b9e 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -24285,6 +24285,21 @@
         "supports_tool_choice": true,
         "supports_vision": true
     },
+    "mistral/ministral-8b-2512": {
+        "input_cost_per_token": 1.5e-07,
+        "litellm_provider": "mistral",
+        "max_input_tokens": 262144,
+        "max_output_tokens": 262144,
+        "max_tokens": 262144,
+        "mode": "chat",
+        "output_cost_per_token": 1.5e-07,
+        "source": "https://mistral.ai/pricing",
+        "supports_assistant_prefill": true,
+        "supports_function_calling": true,
+        "supports_response_schema": true,
+        "supports_tool_choice": true,
+        "supports_vision": true
+    },
     "mistral/mistral-tiny": {
         "input_cost_per_token": 2.5e-07,
         "litellm_provider": "mistral",
diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index 75889e98dbb..5db89e37739 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -24455,6 +24455,21 @@
         "supports_tool_choice": true,
         "supports_vision": true
     },
+    "mistral/ministral-8b-2512": {
+        "input_cost_per_token": 1.5e-07,
+        "litellm_provider": "mistral",
+        "max_input_tokens": 262144,
+        "max_output_tokens": 262144,
+        "max_tokens": 262144,
+        "mode": "chat",
+        "output_cost_per_token": 1.5e-07,
+        "source": "https://mistral.ai/pricing",
+        "supports_assistant_prefill": true,
+        "supports_function_calling": true,
+        "supports_response_schema": true,
+        "supports_tool_choice": true,
+        "supports_vision": true
+    },
     "mistral/mistral-tiny": {
         "input_cost_per_token": 2.5e-07,
         "litellm_provider": "mistral",
diff --git a/tests/local_testing/conftest.py b/tests/local_testing/conftest.py
index 6a746041f15..5389dd96aed 100644
--- a/tests/local_testing/conftest.py
+++ b/tests/local_testing/conftest.py
@@ -22,6 +22,19 @@ sys.path.insert(
 )  # Adds the parent directory to the system path
 import litellm
 
+# ``litellm.model_cost`` is loaded at import time from the URL pinned to
+# ``main`` (``LITELLM_MODEL_COST_MAP_URL``).  The in-tree backup ships with
+# this branch and can include pricing entries that main has not yet picked
+# up (e.g. an upstream provider rotates a model id and the test cassette
+# records the new name).  Backfill any entries that are missing from the
+# remote-fetched map so cost-calculator lookups in tests succeed against
+# the cassette state the branch is being tested with.
+from litellm.litellm_core_utils.get_model_cost_map import GetModelCostMap
+
+for _k, _v in GetModelCostMap.load_local_model_cost_map().items():
+    litellm.model_cost.setdefault(_k, _v)
+del _k, _v
+
 from tests._vcr_conftest_common import (  # noqa: E402,F401
     VerboseReporterState,
     _pin_multipart_boundary,