Matt Shumer still prefers Astra after testing GPT-6 Sol

Matt Shumer @mattshumer_Originally posted 2026.09.23

Open original on X

I've been testing GPT-6 Sol for a bit now. It's solid, but I still prefer Astra/Fable 5.1 (and now, likely Opus 5.5) for my day to day. We're spoiled by so many amazing model options now!

This post quotes another post: “OpenAI releases GPT-6 Sol and Luna with 50% lower API prices”