AI Accelerating AI Development

The empirical core of *When AI builds itself*: measured evidence AI already speeds AI R&D at Anthropic — >80% of merged code Claude-authored, ~8× code/engineer/day vs 2024, a kernel-optimization eval going 3×→52× in a year, an automated researcher recovering 97% of a weak-to-strong gap, and model next-step judgment beating humans 64%