Anthropic: Claude Now Writes 80%+ of Its Own Production Code, Calls for a Global 'Pause Button'
VentureBeat·high signal
In a new report 'When AI Builds Itself' (June 4), Anthropic's Jack Clark and Marina Favaro disclose that as of May, Claude authored over 80% of code merged into Anthropic's production codebase — up from under 10% in early 2025 — and engineers now ship roughly 8x more code per quarter than in 2021-2025. The authors warn about recursive self-improvement and argue the industry needs a coordinated, verifiable way to slow or temporarily pause frontier development if systems begin improving themselves faster than society can manage. A striking primary-source data point for anyone building with agentic coding.