fix for supports_reasoning check added in 68f4847

Author: ishaan-jaff

litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py

@@ -465,7 +465,6 @@ def _map_thinking_param(
             params["includeThoughts"] = True
         if thinking_budget is not None and isinstance(thinking_budget, int):
             params["thinkingBudget"] = thinking_budget
-
         return params
 
     def map_response_modalities(self, value: list) -> list:
@@ -618,7 +617,12 @@ def map_openai_params(  # noqa: PLR0915
                 optional_params = self._add_tools_to_optional_params(
                     optional_params, [_tools]
                 )
-        if supports_reasoning(model):
+        
+        ######################################################################################
+        # If the model supports reasoning and `thinkingConfig` is not set as yet 
+        # we should set it to includeThoughts
+        ######################################################################################
+        if supports_reasoning(model) and "thinkingConfig" not in optional_params:
             optional_params["thinkingConfig"] = (
                 VertexGeminiConfig._map_reasoning_effort_to_thinking_budget(
                     non_default_params.get("reasoning_effort")

tests/llm_translation/test_gemini.py

@@ -329,7 +329,7 @@ def test_gemini_thinking_budget_0():
             "thinking": {"type": "enabled", "budget_tokens": 0},
         },
     )
-    print(raw_request)
+    print(json.dumps(raw_request, indent=4, default=str))
     assert "0" in json.dumps(raw_request["raw_request_body"])