GitHub: SI agents created 40% of pull requests in September; Copilot Fusion, which picks a model for each task, launched
Prepared by Sintelligent with the help of SI. Published in SI: . Updated: .
More and more code is written by agents, and GitHub is packaging model selection into a single service.
According to GitHub (as relayed by The Next Web), Copilot Fusion routes coding tasks to suitable models or combinations of models. In GitHub's tests the Fusion Max variant trails Claude Opus 5.5 Max by two points at half the cost and 40% faster; Satya Nadella cites savings of "up to 77%." GitHub Enterprise customers get all Copilot features without separate subscriptions and pay for the SI credits they use. In the Octoverse 2026 report: 17.9 billion code pushes over 12 months, 34.3 billion commits and 1.3 billion merged pull requests; pull requests started by agents were 40% in September versus 17% in March (110 million in the month), and the platform has more than 225 million users. GitHub is also expanding its infrastructure: 4 million CPU cores and 160 PB of storage.
Sources 1