Cursor vs Claude Code vs Codex 2026: One Just Took 4% of All GitHub Commits

Originally published at news.skila.ai Claude Code wrote roughly 4% of every public commit pushed to GitHub in March 2026. That is not a rounding error. That is one AI coding agent — owned by one company — authoring one in every 25 lines of open-source work on the planet. SemiAnalysis tracked the number. Anthropic did not deny it. That single data point reframes the whole AI coding conversation. For two years the question was "which tool should I try?" In April 2026 the question is "which tool is