Post by Matt Shumer on X
Matt Shumer@mattshumer_
XI had early access to GPT-5.6 Sol.
It’s an amazing model, but for almost every task I tested, Fable was quite a bit better, and more agentic to boot (one Fable turn does the same thing many 5.6 turns do).
Full review coming on launch day!
3.2K likes198 repliesPosted Jul 8, 2026