GitHub Copilot

Autocomplete and chat wherever you already write code.

About GitHub Copilot

GitHub Copilot is an AI tool that writes code suggestions inside the editor as a developer types. Suggestions range from finishing the current line to proposing an entire function, and it can offer alternatives when more than one approach would work.

Copilot integrates directly with the code editor, including Visual Studio Code, so suggestions appear in the file being edited rather than in a separate window. It supports multiple programming languages. The machine learning models behind it are supplied by OpenAI and were trained on billions of lines of public code.

A second set of features works on code that already exists. Copilot Autofix takes security alerts and proposes remediation, using contextual vulnerability intelligence and advice tied to the specific alert rather than generic guidance, and it can apply fixes automatically. GitHub states that automatic fixes cover 90% of alert types in JavaScript, TypeScript, Java and Python. Autofix is aimed at remediation rather than detection alone: the alert comes with advice about the vulnerability it describes and a proposed change to the code.

Secret detection is part of the same picture. Copilot uses AI to find unstructured tokens such as passwords sitting in code, where a fixed pattern match would miss them, and organisations can define custom patterns so that their own internal secret formats are caught as well. That combination, completion plus scanning of existing code, means Copilot is used both when writing new code and when cleaning up code that is already written.

Copilot can be used at no cost with up to 2,000 completions a month. Beyond that it requires a paid subscription, and the free allowance is a starting point rather than a permanent free tier for heavy use.

Copilot is made by GitHub and launched in June 2021. It is not open source, and there is no self-hosted deployment option: it runs as a service and integrates with development tools from there, which is worth knowing for teams with a policy against sending source code to an external service.

Key features

Suggests whole lines or entire functions as you type, with alternative suggestions to pick from.
Runs inside the code editor, including Visual Studio Code.
Fixes code scanning alerts automatically with Copilot Autofix and contextual vulnerability advice.
Covers automatic fixes for 90% of alert types in JavaScript, TypeScript, Java and Python.
Detects unstructured tokens such as passwords sitting in code.
Matches organisation-specific secrets through custom detection patterns.
Writes code in multiple programming languages, from models trained on billions of lines of public code.
Includes up to 2,000 completions per month at no cost.

What people use it for

Writing a function body from a comment or signature instead of typing it out.
Clearing a backlog of code scanning alerts in a JavaScript or Python repository.
Catching a password left in source code before the commit ships.
Adding a detection pattern for an internal token format that generic scanners miss.
Trying the free monthly completions allowance before paying for a seat.

Key facts about GitHub Copilot
Category	Developer tools
Pricing	Paid
Free tier	No
Upvotes	6
Listed	22 August 2026

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