Seems like 5.6 isn't on level of fable 5 yet (still it will be much better in other aspects)
OpenAI model activity is surfacing — worth tracking for capability changes, ecosystem impact, and availability.
Matt Shumer, who had early access to GPT-5.6 Sol, reports it's an amazing model and a significant improvement over 5.5.…
Matt Shumer @mattshumer_ Follow I 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! 10:30 AM · 08 Jul 26 · 46.3K Views 57 33 654 93 Relevant View quotes > Matt Shumer @mattshumer_ · 1h Don't get me wrong, this model is a huge jump over 5.5. Fable just has the feel of a much bigger model that I can trust a good bit more! I expect OpenAI will have an answer to Fable soon.