Why does the Custom GPT mention feature no longer work?

ChatGPT Bugs
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1

Hi team,

I’m having an issue with the Custom GPT mention feature. Previously, I was able to mention my GPTs in a conversation using @ + GPT name, and the model would recognize and call that GPT. However, this feature suddenly stopped working.

I can still access my GPTs from the GPTs menu, but I can no longer invoke them inside a chat using “@”, which was extremely useful for workflow and productivity.

Details

  • It used to work before

  • Now it no longer works at all

  • No changes were made on my end

  • Issue persists across sessions

  • Region: Paraguay

  • Platform: (adjust this)

    • Browser / Desktop / Mobile App

  • App updated to latest version

Questions

  1. Is this a bug or an intentional removal?

  2. If intentional, is there any official confirmation?

  3. Will this feature return?

  4. Is there any alternative way to reference GPTs inside a chat?

This feature is important because it allows seamless switching between GPTs without needing to manually reopen or migrate conversations.

Thanks in advance, and I’d appreciate any clarification from OpenAI staff or other users experiencing the same issue.