Lenny's Newsletter · 28 September 2026

🎙️ How I AI: Jev for beginners + I left Claude for months, Opus 5.5 brought me back + Opus 5.5 vs. GPT-6 Sol bench

Lenny Rachitsky

Claire tests TypeSafe's Jev decision model for cheap classification ($0.04/MTok), pairs it with frontier models for cost-effective pipelines, reviews Claude Opus 5.5's return to her workflow, and benchmarks GPT-6 Astra, Sol, and Opus 5.5 across writing, frontend, SVG, agents, and video editing tasks.

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Topics: AI (Horizontal) · Developer Tools

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