Gpt-5-codex having trouble #3380

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1. ru-aish

   added

   bugSomething isn't workingSomething isn't working

   on Oct 23, 2025
2. github-actions commented on Oct 23, 2025

   

   github-actionsBot

   on Oct 23, 2025 – with GitHub Actions

   Contributor

   More actions

   This issue might be a duplicate of existing issues. Please check:

   • Copilot / gpt-5-codex "model gpt-5-codex is not accessible via the /chat/completions endpoint" #2758: Reports the exact same error "model gpt-5-codex is not accessible via the /chat/completions endpoint" when trying to use gpt-5-codex from GitHub Copilot
   • GPT-5-Codex over GitHub copilot does not work #2977: Similar issue with GPT-5-Codex over GitHub Copilot not working, mentions the model uses the new /responses endpoint instead of /chat/completions (closed)
   • GitHub Copilot's gpt-5-codex model is not accessible via OpenAI /chat/completions endpoint #2778: Same error message and problem description when trying to use GPT-5-Codex through GitHub Copilot provider (closed)

   Feel free to ignore if none of these address your specific case.
3. rekram1-node commented on Oct 23, 2025

   

   rekram1-node

   on Oct 23, 2025

   Contributor

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   Yeah we need to figure out how to address this, it is a known issue, closing as duplicate
4. rekram1-node

   closed this as a duplicateof Copilot / gpt-5-codex "model gpt-5-codex is not accessible via the /chat/completions endpoint" #2758 on Oct 23, 2025