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Grok 4 always fails to generate a response

When I submit a prompt to Grok 4, I always get the following error:
“Model failed to generate a response. You have not been charged for this request. Please try again.”
Submitting it again does not resolve it. This started a few days ago. Shortly after Grok 4 launch, it was initially working. Now it never works for me.

Status: Closed4 comments

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Comments4

  • Cyan Snake

    Must be a demand thing like you said, and maybe bad timing/luck on my part. It seems to be working well again in the past hour. I’m sure they are getting unusually high demand. Thanks for taking a look.

    • Mark Florkowski

      Team

      Feel free to comment again if you’re consistently having issues, happy to look again!

  • Mark Florkowski

    Team

    This seems like a failure in the Grok 4 API. It seems to have been struggling with capacity since shortly after launch, but I will see if there is anything we can do to improve feedback on our end.

    I just tried a few (admittedly pretty basic) prompts and they seemed to work without issue, can you provide any insight into the type of requests you are making where you are running into this?

  • Cyan Snake

    Oh, and other models work fine. Claude 4 works as expected.