one year on
GitHub and OpenAI launch Copilot technical preview, an AI pair programmer that writes code
The tool, built on OpenAI's new Codex model, lives inside Visual Studio Code and autocompletes entire functions.
GitHub and OpenAI today launched a technical preview of GitHub Copilot, an AI pair programmer that lives inside the Visual Studio Code editor and autocompletes code snippets — not just single lines, but entire functions. Powered by OpenAI Codex, a new model trained on terabytes of public source code, Copilot analyzes the context of what you’re typing and generates matching code, from importing tweets to drawing scatterplots. It works especially well with Python, JavaScript, TypeScript, Ruby, and Go.
The tool is the first major product to emerge from Microsoft’s $1 billion investment in OpenAI. GitHub CEO Nat Friedman called it ‘your AI pair programmer,’ drawing a parallel to the practice of two developers working together to catch mistakes and speed up development. OpenAI plans to release a standalone version of Codex via its API later this summer, according to a company representative.
But the preview comes with caveats. GitHub warns that Copilot may produce biased, discriminatory, or offensive outputs, and that it could occasionally suggest sensitive data like email addresses or API keys, though the company says such instances are rare and the data appears synthetic. A test found only 0.1% of generated code matched training data verbatim.
The record
Announced the technical preview, describing Copilot as a tool that draws context from the code you're working on and suggests whole lines or functions.
Described OpenAI Codex, the model powering Copilot, as a descendant of GPT-3 that is significantly more capable in code generation.
One year later — open only if you can handle spoilers
Within two years, GitHub Copilot became a paid subscription service and a standard tool for millions of developers, spawning competitors like Amazon CodeWhisperer and Google's Codey. OpenAI Codex, meanwhile, was eventually deprecated in favor of later GPT models, but its impact on AI-assisted coding proved foundational.
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