Today is rolling GPT-5.1 and my custom GPT, that uses an external MCP to do some actions is refusing to do the thing. I’ve tried updating it, but even in the actions panel of the custom GPT when I click the “Test” button beside an action I get a error response. The GPT says it doesn’t have any acti…

@OpenAI_Support mentioned that they were looking into the issue, but it hasn’t been resolved and there has been no follow-up since then. Once a commitment is made, I believe it’s important to see it through. Could you please provide an update?

Hi everyone, we have a fix for this and are just waiting to deploy! We'll update here once it's live. Thank you all for your patience.

Hi everyone, It is working for me again. I’ll try it deeply but, right now, my GPT is using the actions again. Thank you @OpenAI_Support

Hi everyone, thank you for your patience. We can now confirm that this issue has been resolved.

yeahhhh!!! I’m back from Gemini, ChatGPT is the best :stuck_out_tongue:

Thanks @OpenAI_Support . The issue has been fixed, however there is another issue. Earlier, users had option to choose from the legacy models and select model recommended by custom GPT. In 5.1 the option to use previous models is not there with free users. Unfortunately, 5.1 is hallucinating a lot I…

Thanks @OpenAI_Support for fixing the the issue :tada:

Hi @Madhur_Sharma , Could you create one or two new topics for the suggestions? This thread is focused on the resolved custom actions issue and the ideas might get lost once it’s closed. Thank you!

We also tested on our side and confirmed that the issue has been resolved. Thank you for taking care of this. That said, this same type of problem has occurred in the past as well https://community.openai.com/t/custom-gpt-oauth-stuck-on-talking-to-domain-looking-for-official-guidance/1348110 I u…

We have an enterprise subscription and we’ve noticed with 5.1, the calling of our tools is really much poorer. It’s not calling it and sometimes resorts to public information or weird Python coding, which it tries. Again, it’s a huge step backwards in terms of 5. Therefore, we turned off 5.1 and wen…

GPT-5.1 broke my custom GPT actions

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GPT-5.1 broke my custom GPT actions

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