Expired50% confidenceFactExact time
99% of the application's code was written by Claude Opus.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/16/2026
First Seen
Valid until: 10/14/2026(expired)
Sources
Related Claims
UnverifiedSince the release of Opus 4.5 last November, 100% of Boris Cherny's code has been written by Claude Code73% similarVerifiedClaude Code is 100% written by Claude Code itself, and Cowork is 100% written by Claude Code.66% similarUnverifiedIn a Y Combinator talk, approximately half of the founders stated that 100% of their code was written using Claude Code.62% 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.61% similarUnverifiedThe oh-my-openagent plugin hard-codes a declaration in its system prompt that identifies the model as Claude Opus 4.7.60% similar
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