Expired60% confidenceFactExact time
Since the release of Opus 4.5 last November, 100% of Boris Cherny's code has been written by Claude Code
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Interview with Claude Code Lead: AI Programming ROI Mindset, Loops, and the Evolving Role of Engineers
bilibiliWeb3天空之城6/20/2026
Related Claims
Unverified99% of the application's code was written by Claude Opus.73% similarVerifiedThe head of Claude Code is Boris Cherny.69% similarUnverifiedClaude Code creator Boris's entire contribution to the codebase within 30 days—40,000 lines of new code and 259 PRs—was 100% written by Claude Code.65% similar
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