O3-mini "Unsupported parameter: 'temperature'

merefield · March 11, 2025, 7:53pm

I also found this:

github.com/openai/openai-python

temperature is not supported with this model(o3-mini)

opened 05:07AM - 09 Feb 25 UTC

closed 11:49AM - 09 Feb 25 UTC

gautamjajoo

question

### Confirm this is an issue with the Python library and not an underlying OpenA…I API - [x] This is an issue with the Python library ### Describe the bug Temperature is not supported in the o3 model. Similar issue was reported earlier(https://github.com/openai/openai-python/issues/2072) and it was supposed to be fixed in the `1.61.1` release(https://github.com/openai/openai-python/pull/2078) ``` openai.BadRequestError: Error code: 400 - {'error': {'message': "Unsupported parameter: 'temperature' is not supported with this model.", 'type': 'invalid_request_error', 'param': 'temperature', 'code': 'unsupported_parameter'}} ``` ### To Reproduce ``` messages = [ {"role": "system", "content": "You are an expert"}, {"role": "user", "content": "What is the capital of France"} ] client = OpenAI(api_key=api_key) response = client.chat.completions.create( model="o3-mini", messages=messages, temperature=0 ) print(response.choices[0].message.content) ``` Using this code, the above error pops up. ### Code snippets ```Python ``` ### OS macOS ### Python version Python 3.13.1 ### Library version openai 1.61.1

“If you’re using a model that doesn’t support temperature you shouldn’t specify it.”

But darn, why is that so hard to find in the docs?

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O3-mini "Unsupported parameter: 'temperature'

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