OpenAI’s Pando cuts Git push latency by about 80% for its monorepo

OpenAI's custom Git backend serves nearly one petabyte of data a day and was built in about 10 weeks with help from Codex agents OpenAI has built its own Git backend. It is called Pando, and it reportedly makes pushing code to the company’s monorepo about 80% faster. That works out to a nearly fivefold drop in median push latency. The bigger story sits behind the speed number. OpenAI says its repository was buckling under a surge of commits from Codex, its AI coding agent. What Pando actually does OpenAI announced Pando on November 2, 2026. According to the research findings, the system went into production in April 2026 after about 10 weeks of development. The build team was unusually small. One engineer led the project, with substantial help from teams of Codex agents. Pando tackles two separate scaling headaches. The first is many people writing to different branches at the same time. The second is heavy read traffic, such as fetches and clones. Pando allows parallel updates to unrelated branches while keeping the order of changes consistent within each branch. The technical term is causal consistency per branch, and in practical terms it means edits on a single branch still lan...