OpenAI Codex Startups

GitHub Copilot is an AI pair programmer that provides real-time, multi-line code suggestions powered by OpenAI's Codex model. Incubated within GitHub's R&D team (GitHub Next) after OpenAI's accidental mass cloning of GitHub repositories, it evolved from early experimentation to a technical preview that generated viral enthusiasm before achieving general availability. The product represents a fundamental shift in developer productivity, with Python developers writing approximately 40% of their code with Copilot assistance.