AI Agents Now Start Over 40% of GitHub Pull Requests, Octoverse 2026 Finds

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GitHub's Octoverse 2026 report, released October 28, says more than 40% of pull requests in September 2026 began with a first draft from a coding agent, up from 17% in March. That amounts to about 110 million agent-started PRs in a single month. Agent-involved PRs merged within two weeks at a 90% rate in September, compared with about 86% for those without detected agent involvement. The report measured merges rather than code correctness, so it offers no data on bugs, security issues, or reverts. GitHub also notes the figure is a floor, since it only counts agent use it can detect, and that it refers to pull requests rather than total lines of code.

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