Anthropic: Over 80% of Its Code Now Written by Claude, Output Up Eightfold

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Anthropic has published an essay titled 'When AI Builds Itself,' describing how AI is already deeply embedded in its own software development process. The company reports that more than 80% of its production code is now written by Claude, with engineers shipping roughly eight times more code than they were in 2024. Unlike many online discussions, the essay focuses on changes already observed internally rather than speculative future predictions. A developer who read the full essay noted that AI is accelerating code execution, but that human judgment — deciding what to build and whether results make sense — remains a distinct and irreplaceable skill. The essay has prompted renewed debate about what makes software engineers valuable as AI takes over more routine coding tasks.

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