Anthropic says Claude writes 80% of its own code and the world needs a plan to hit the brakes

One of Anthropic’s engineers hasn’t written a line of code in five months. Not because the work dried up, but because Claude does it now. As of May 2026, more than 80% of the code merged into Anthropic’s production codebase was authored by Claude, up from low single digits when Claude Code launched in February 2025. […]
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