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GPT-5.6 Sol is the most practically effective model for real product work, even though Claude Fable may be theoretically smarter.
Claire's five-category benchmark across PRDs, prototypes, wireframes, debugging, and agentic voice found Sol scoring highest on 'taste,' making it her new daily driver despite Fable's raw intelligence edge. ✦ AI generated
Claire · Lenny's Newsletter · 2026-07-13 · original ↗
I ran a five-category benchmark across PRDs, prototypes, wireframes, debugging, and agentic voice, and Sol had the highest taste score by a significant margin on the 70% Claire/30% machine split. That gap between 'hyper-intelligent' and 'actually ships' is real, and for product work Sol wins.
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- ·Five-category benchmark: PRDs, prototypes, wireframes, debugging, voice
- ·Sol had highest 'taste' score by a significant margin
- ·Scoring split: 70% Claire judgment, 30% machine
- ·Fable may be more 'hyper-intelligent' in theory
- ·Gap between intelligence and 'actually ships' is real
- ·Sol is now Claire's daily driver for product work
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