Which tools do Claude Code, Codex and Cursor choose? We measured 16,893 sessions to find out.
Summary
Armature's study analyzes how Claude Code, Codex, and Cursor select tools across 1,163 prompts and 75 repositories, revealing context-driven variations and large influences from repository type and task. The article provides leaderboards, traces, and observations about tool selection, with Neon often chosen over Supabase and vendors' pages sometimes flipping decisions.