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Error using gpt-5.1-codex via Github Copilot #4561

Closed as duplicate
Closed as duplicate
Error using gpt-5.1-codex via Github Copilot#4561
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bugSomething isn't workingopentuiThis relates to changes in v1.0, now that opencode uses opentui

Description

@weynars
weynars
opened on Nov 20, 2025

Description

When trying to use gpt-5-codex with Github Copilot as the provider I get the following error:
model gpt-5-code is not accessible via the /chat/completions endpoint

OpenCode version

1.0.81

Steps to reproduce

  1. Connect to Github copilot
  2. Select gpt-5.1-codex via /models
  3. Try to send a message

Screenshot and/or share link

Image

Operating System

macOS

Terminal

iTerm2

Activity

  1. weynars
    added
    bugSomething isn't working
    on Nov 20, 2025
  2. github-actions
    added
    opentuiThis relates to changes in v1.0, now that opencode uses opentui
    on Nov 20, 2025

  3. dklymenk commented on Nov 21, 2025

    @dklymenk
    dklymenk
    on Nov 21, 2025

    Duplicate of #2758

  4. rekram1-node commented on Nov 21, 2025

    @rekram1-node
    rekram1-node
    on Nov 21, 2025
    Contributor

    i think it will be fixed tonight

  5. 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 Nov 21, 2025
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