GPT-5.6 Sol Hands-on: Fable is Stronger in Most Tasks
mattshumer_ · x · 2026-07-08
Developer Matt Shumer gained early access to GPT-5.6 Sol. He calls it an excellent model, but in almost all tasks he tested, Anthropic's Fable was clearly stronger and more agentic—Fable could often complete in a single turn what GPT-5.6 required multiple turns to finish. He teased that a full evaluation will be published on the official release date.
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