This report provides evidence on how Claude Code is used in practice, based on a privacy-preserving analysis of around 400,000 interactive sessions from around 235,000 people between October 2025 and April 2026.

Anthropic's study of 400,000 Claude Code sessions reveals humans drive 70% of planning while AI handles 80% of execution, with experts getting 5x more

This report provides evidence on how Claude Code is used in practice, based on a privacy-preserving analysis of around 400,000 interactive sessions from around 235,000 people…