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Peter Yang on GPT-6 Sol: better than 5.6, but not Opus 5.5

He says Sol is clearly stronger than GPT 5.6, but still ranks Opus 5.5 above Fable and Astra as the best model available right now.

Peter Yang
@petergyangArchived 2026.09.23Originally posted 2026.09.23
Peter Yang @petergyangOriginally posted 2026.09.23
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GPT 6 Sol definitely feels better than GPT 5.6 and I still prefer ChatGPT as my harness but in my humble opinion Opus 5.5 is the best model available right now. I prefer it over both Fable and Astra.

x.com/petergyang/status/2102492010762609066Archived 2026.09.23 10:16