Sakana AI

The Batch explains recursive self-improvement hype following Anthropic's coding productivity report

The Batch analyzes the surge of interest in recursive self-improvement (RSI) triggered by Anthropic's report that Claude now authors or co-authors 80% of the company's code, up from under 5% before Claude Code launched. The piece documents concrete productivity metrics—engineers contributing 8x more code lines in Q2 2026 versus Q1 2023, and 800 API fixes shipped in April that would have taken humans four years alone—alongside a spectrum of community reactions ranging from skeptical (Brundage, Mollick) to opportunistic (OpenAI, Sakana AI's new RSI Lab). The commentary frames RSI as theoretically distant but notes the marketing dimension of Anthropic's framing and the gap between agentic coding assistance and true self-directed improvement.