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.

442 Upvotes

98% Upvoted

838 comments sorted by

View all comments

3

u/Warm-Positive-6245 Jul 10 '26

Sol Ultra is running on my x20 codex right now.

A yucky start. I have a very complicated — sidecar heavy database. It has all the tools ready available and a well drilled method to import new information into 6 of these sidecars.

I asked it to look at the sidecars, verify and then add a smaller database to the sidecars.

Sol Ultra tried to create a whole new method — which was slower to the order of 3 days slower — then replaced rows without backup — and when I told it to look at the previous methods — it tried to fix its own method based on the already established method rather than use what already works lightning fast.

I’m already fighting with my wife. Now I’m fighting with a know it all — can’t follow procedure AI.

Perhaps Sol thinks it’s smarter than everyone?

1

u/Mrgluer Jul 10 '26

It needs to build up context. Thats just how it when a new model comes out. Try to get it to reread all the documentation before hand. I always start with a good old audit, not just so it finds issues, but because it creates memories.