An analysis of agentic skill decay cited a 2026 Anthropic study examining junior engineers learning the Python library Trio, reporting that participants who used AI assistants scored 50% on a follow-up quiz compared with 67% for those working by hand1. The same analysis referenced approximately 400,000 Claude Code sessions studied by Anthropic and found that even intermediate expertise in a task increased the chances of reaching verified success.
AI-Assisted Coders Scored 50% on Retention Quiz vs 67% for Manual Workers
An analysis of agentic skill decay cites an Anthropic study where AI-assisted junior engineers scored 50% on a retention quiz versus 67% for those coding…