Next up is GPT-6.1 Sol, which I also had early access to for some time, and I am super excited about it! In my testing it is as good as GPT-6 Astra but faster and much cheaper. This will have a massive impact on building with Codex!
Derya Unutmaz, an immunologist and professor, had 6.1 Sol early too, and filmed this from the keynote as it was announced.