GPT 5.2 Top_P Error | OpenAI | Page 1

Reported by @bold tendon

Bug Report: GPT 5.2 Top_P Error

`Steps to Reproduce`

Trying to test out GPT 5.2 for my project. Testing in Playground and in API with my project, get a 400 error every time saying Top_P is not supported. But Playground doesnt have a Top P value and my project isn't calling citing or specifying Top_P anywhere. Can't seem to fix

If I make a new prompt it works, but the second I save the prompt in playground, boom, broken and talking about Top_P

"Unsupported parameter: 'top_p' is not supported with this model."

`Expected Result`

response generation

`Actual Result`

"Unsupported parameter: 'top_p' is not supported with this model."

`Environment`

OpenAI Playground, and also in the API

Additional Information

Please provide relevant details to help resolve the issue, such as:

ChatGPT Shared Link (if applicable).
Screenshots or videos demonstrating the problem.

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#GPT 5.2 Top_P Error