OpenAI gpt-5-chat does not support (encrypted) reasoning (#3332)

Author: DouweM

pydantic_ai_slim/pydantic_ai/profiles/openai.py

@@ -62,7 +62,10 @@ def __post_init__(self):  # pragma: no cover
 
 def openai_model_profile(model_name: str) -> ModelProfile:
     """Get the model profile for an OpenAI model."""
-    is_reasoning_model = model_name.startswith('o') or model_name.startswith('gpt-5')
+    is_gpt_5 = model_name.startswith('gpt-5')
+    is_o_series = model_name.startswith('o')
+    is_reasoning_model = is_o_series or (is_gpt_5 and 'gpt-5-chat' not in model_name)
+
     # Check if the model supports web search (only specific search-preview models)
     supports_web_search = '-search-preview' in model_name
 
@@ -91,7 +94,7 @@ def openai_model_profile(model_name: str) -> ModelProfile:
         json_schema_transformer=OpenAIJsonSchemaTransformer,
         supports_json_schema_output=True,
         supports_json_object_output=True,
-        supports_image_output=is_reasoning_model or '4.1' in model_name or '4o' in model_name,
+        supports_image_output=is_gpt_5 or 'o3' in model_name or '4.1' in model_name or '4o' in model_name,
         openai_unsupported_model_settings=openai_unsupported_model_settings,
         openai_system_prompt_role=openai_system_prompt_role,
         openai_chat_supports_web_search=supports_web_search,