Gpt pro

[viral sentinel]

{"detail":"The 'gpt-5.4-pro' model is not supported when using Codex with a ChatGPT account."}

[upbeat walrus]

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[gaunt geyser]

Yep, that error is expected.

gpt-5.4-pro is on the direct OpenAI API path, not the ChatGPT/Codex account path.

Use one of these instead:

• ChatGPT/Codex login → openai-codex/gpt-5.4
• Codex harness/app-server → codex/gpt-5.4
• OpenAI API key + Pro model → openai/gpt-5.4-pro

So the fix is basically:

// ChatGPT/Codex account
{
  agents: { defaults: { model: { primary: "openai-codex/gpt-5.4" } } }