Boris Cherny: We Cut 80% of Claude Code’s Prompt
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- AI Tools
- Type
- ARTICLE
- Added
- Aug 11, 2026
About
Fresh off the launch of Opus 5, Claude Code creator Boris Cherny joins Diana Hu at Startup School 2026 to talk about what the newest models can do, how Claude Code came to be, and what it means to build products when the underlying capabilities keep accelerating. Transcript: https://www.ycrootaccess.com/p/boris-cherny-building-claude-code Apply to Y Combinator: https://www.ycombinator.com/apply Work at a startup: https://www.ycombinator.com/jobs Chapters: 00:00 — Intro 00:07 — What Makes Opus
Why it made the leaderboard
First-hand account of how the Claude Code team decides what belongs in a system prompt and what to delete, from the person who built it.
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