Store=true doesn't work with codex, it return 400 bad request: Store must be false
OpenAI Developer Community
June 4, 2026
Thanks for your reply. My goal is to restore from the last response without sending the overall conversation. I read OpenAI docs, and it tells me that I can set store=true it to keep my response in the server for about 30 seconds, so I tried to update the Codex source to do that. As my understanding, if sending the overall conversation, it will consume more tokens, instead of sending previous_response_id, right? I also retried with some models, but none of them worked. This is the response:
It seems the ChatGPT backend hard-blocks store=true for every model
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