Anthropic Research: Longest Autonomous Agent Sessions Doubled to 45+ Minutes as Experienced Users Shift to Auto-Approve

Anthropic·low signal

Anthropic's 2026 Agentic Coding Trends Report reveals the 99.9th percentile turn duration in Claude Code sessions nearly doubled from under 25 minutes to over 45 minutes between October 2025 and January 2026. Software engineering accounts for nearly 50% of all agentic activity. Experienced users are increasingly shifting to auto-approve mode instead of checking each action, with most actions remaining low-risk and reversible. The takeaway: power users are treating agents less like tools and more like autonomous colleagues.