GPT-5 removed parameters: logprob, Top-p, temperature

API
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I was trying to use GPT-5, but it complained about not supporting logprob, top-p, and that temperature must only be 1.

Is these correct?

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It’s a reasoning model so there is a more restricted set of params.

eg you can’t stipulate Temperature.

Check the docs.

If you need more LLM control, fall back to 4.1/4o.