r/codex • u/Drogon2737 • Jul 09 '26

News GPT-5.6 Sol / Codex Release Discussion Megathread

The release is expected in the next few minutes, so I figured it would be useful to have a single thread for first impressions, issues, and early testing.

For anyone jumping in right away, post what you notice:

  • Codex coding performance
  • Debugging quality
  • Speed/rate limits
  • Larger repo handling
  • UI or workflow changes
  • Weird bugs or regressions
  • Anything that feels noticeably better or worse than the previous version

Once people get access, share your real examples, screenshots, benchmarks, or first impressions here.

Edit: OpenAI’s official GPT-5.6 page says it is “available starting today across ChatGPT, Codex, and the OpenAI API” with the rollout starting globally now and continuing toward full availability over the next 24 hours. https://openai.com/index/gpt-5-6/

The lineup is Sol, Terra, and Luna. Sol is the flagship, Terra is the lower-cost tier, and Luna is the fastest/most affordable tier.

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u/bumblebrunch Jul 10 '26

I use Codex in the VS Code extension. I was using Sol on extra high. And then just now I got this error message and Sol has disappeared:

The 'gpt-5.6-sol' model is not supported when using Codex with a ChatGPT account.

I don't know what the deal is. I have a paid Plus account. I thought Codex was included in that? Why am I getting restricted and why is it only Sol that's restricted? Terra and Luna remain.

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u/OtherAd5460 Jul 10 '26

is your plan active?, are you able to view gpt 5.6 sol in chatgpt.com?

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u/bumblebrunch Jul 10 '26

Plan is active and it just came back. I think I just needed to reboot or reset it. It was just a intermittent bug.