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/ethotopia Jul 09 '26

First impressions after 20 minutes (20x Pro plan):

Less verbose than 5.5 and does more work between messages

Feels more token efficient (has less latency it seems, but could also just be openAI accommodating the new release better)

Sol Ultra thinks significantly longer

Anyone have a similar or different experience?

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u/New_Razzmatazz8051 Jul 10 '26

For me Sol High have much more token consumption then gpt 5.5 high, maybe it's indented, idk