By May, over 80% of the code in Anthropic's production base was written by Claude. In Q2, engineers merged eight times more code daily than in 2024, thanks to Claude automating much of the development work.

Claude is a model that improves itself and writes code to build its next version. Humans still lead in setting goals and handling complex context, but agents already outperform people in research tasks with clear metrics.

In one AI safety experiment, agents improved solutions by 97% in a week, while humans managed 23%. Anthropic sees this self-improving cycle accelerating faster than expected and calls for coordination tools, including possible pauses in frontier AI development.