Anthropic's AI, Claude, now writes over 80% of the code merged into its own production codebase as of May 2026. Before Claude Code's research preview in February 2025, that figure was in the low single digits.
Engineers are merging eight times more code per day than in 2024. On internal benchmarks, Claude achieved 52x speedups by May 2026, up from 3x for human programmers a year earlier.
One Anthropic engineer hasn't written code personally in five months. Their role now focuses on direction, review, and architecture. Anthropic frames this as collaboration, not replacement, but acknowledges human oversight is the primary bottleneck.
For investors, the capability curve is steepening, not flattening. Anthropic has publicly called for verifiable global mechanisms to potentially pause frontier AI development if needed.