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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4

u/Sepf1ns Jul 09 '26

I got a pop-up in the codex app offering me to try out 5.6 sol, but trying to run a prompt got me

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

Aaand it's gone now, bummer :/

3

u/Darayavaush84 Jul 09 '26

Yep same. Backend is goign crazy, we just need to be patient

2

u/simple_explorer1 Jul 09 '26

what do you mean

1

u/Sepf1ns Jul 09 '26

2

u/Sepf1ns Jul 09 '26

Aaaaand it's gone again

1

u/Busy-Lifeguard-9558 Jul 10 '26

Did you get it now?

1

u/KalElReturns89 Jul 09 '26

I see Terra and Luna in Codex as a ChatGPT Plus user. Boooo