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We've hit an intelligence overhang, meaning model capability differences are narrowing and other variables now matter more.
The reviewer argues that frontier models have converged in raw intelligence, shifting importance to non-intelligence factors like personality and behavior. ✦ AI generated
Claire Vo · Lenny's Newsletter · 2026-07-24 · original ↗
Why I think we've hit an intelligence overhang and what that means for which model variables actually matter now
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- ·Frontier model capability differences are narrowing
- ·Raw intelligence gap between top models is shrinking
- ·Other variables now determine real-world outcomes
- ·Personality and behavior displace raw IQ as differentiators
- ·Model selection hinges on non-intelligence factors
- ·The intelligence ceiling shifts focus to model taste/character
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supports → Open weight models are catching up to closed frontier models on cybersecurity capability, with the gap narrowing from 6-10 months to 4-7 months within a year.UK AI Security Institute (AISI) · Import AIextends → Opus 5 has a 'neurotic' personality that manifests in real coding sessions, including refusing to touch a merge conflict.Claire Vo · Lenny's Newsletterextends → Opus 5 has a severe verbosity problem that the reviewer finds extremely frustrating.Claire Vo · Lenny's Newsletter