diff --git a/litellm/llms/openrouter/image_edit/transformation.py b/litellm/llms/openrouter/image_edit/transformation.py
index 393feefa75a..84ad38a2d5a 100644
--- a/litellm/llms/openrouter/image_edit/transformation.py
+++ b/litellm/llms/openrouter/image_edit/transformation.py
@@ -211,7 +211,7 @@ class OpenRouterImageEditConfig(BaseImageEditConfig):
                 if img is None:
                     continue
                 mime_type = ImageEditRequestUtils.get_image_content_type(img)
-                image_bytes = self._read_image_bytes(cast(FileTypes, img))
+                image_bytes = self._read_image_bytes(cast(FileTypes, img))  # cast-ok: image entries were narrowed by the None check and FileTypes contract
                 b64_data = base64.b64encode(image_bytes).decode("utf-8")
                 content_parts.append(
                     {
diff --git a/litellm/llms/vertex_ai/context_caching/vertex_ai_context_caching.py b/litellm/llms/vertex_ai/context_caching/vertex_ai_context_caching.py
index 3208a3e5180..1321114a195 100644
--- a/litellm/llms/vertex_ai/context_caching/vertex_ai_context_caching.py
+++ b/litellm/llms/vertex_ai/context_caching/vertex_ai_context_caching.py
@@ -417,7 +417,7 @@ class ContextCachingEndpoints(VertexBase):
             "Content-Type": "application/json",
         }
         if isinstance(token, dict):
-            headers.update(cast(Mapping[str, str], token))
+            headers.update(cast(Mapping[str, str], token))  # cast-ok: token mapping is returned by the Vertex auth helper
         elif token is not None:
             headers["Authorization"] = f"Bearer {token}"
         if extra_headers is not None:
@@ -496,7 +496,7 @@ class ContextCachingEndpoints(VertexBase):
             response: Final = client.post(
                 url=url,
                 headers=headers,
-                json=cast(dict[str, object], cached_content_request_body),
+                json=cast(dict[str, object], cached_content_request_body),  # cast-ok: request body is assembled as JSON object data  # cast-ok: request body is assembled as JSON object data
             )
             response.raise_for_status()
         except httpx.HTTPStatusError as err:
@@ -597,7 +597,7 @@ class ContextCachingEndpoints(VertexBase):
             "Content-Type": "application/json",
         }
         if isinstance(token, dict):
-            headers.update(cast(Mapping[str, str], token))
+            headers.update(cast(Mapping[str, str], token))  # cast-ok: token mapping is returned by the Vertex auth helper
         elif token is not None:
             headers["Authorization"] = f"Bearer {token}"
         if extra_headers is not None:
@@ -673,7 +673,7 @@ class ContextCachingEndpoints(VertexBase):
                 response: Final = await client.post(
                     url=url,
                     headers=headers,
-                    json=cast(dict[str, object], cached_content_request_body),
+                    json=cast(dict[str, object], cached_content_request_body),  # cast-ok: request body is assembled as JSON object data
                 )
                 response.raise_for_status()
             except httpx.HTTPStatusError as err:
diff --git a/litellm/proxy/spend_tracking/spend_tracking_utils.py b/litellm/proxy/spend_tracking/spend_tracking_utils.py
index fd43e1a6daa..a8b025cb0b3 100644
--- a/litellm/proxy/spend_tracking/spend_tracking_utils.py
+++ b/litellm/proxy/spend_tracking/spend_tracking_utils.py
@@ -1797,7 +1797,7 @@ def _placeholder_stored_request_body_metadata(
         {
             "model_group": persisted_model_group,
             "error_information": _scrub_raw_model_from_error_information(
-                cast(StandardLoggingPayloadErrorInformation, error_information),
+                cast(StandardLoggingPayloadErrorInformation, error_information),  # cast-ok: validated mapping is the logging error-information contract
                 raw_model,
             )
             if isinstance(error_information, Mapping)
diff --git a/litellm/responses/bridge_check.py b/litellm/responses/bridge_check.py
index 60318d6b184..9c6575b877f 100644
--- a/litellm/responses/bridge_check.py
+++ b/litellm/responses/bridge_check.py
@@ -164,7 +164,7 @@ def responses_api_bridge_check(
         return model_info, model
 
     try:
-        model_info = cast(
+        model_info = cast(  # cast-ok: provider metadata helper returns the bridge model-info mapping
             dict[str, object],
             get_model_info_helper(model=model, custom_llm_provider=custom_llm_provider),
         )