GitHub Copilot

Completing and rewriting code in your editor from context

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WHAT IT IS

GitHub Copilot is a coding assistant from Microsoft-owned GitHub, built with OpenAI and first offered as a technical preview in June 2021; it provides code completion as an editor plug-in. It continues code from the current file and its context, and also lets you ask questions in natural language and rewrite selected code inside the editor. GitHub Copilot covers major editors including VS Code, Visual Studio and JetBrains.

Why it matters

It was the first large-scale deployment of a large-model coding assistant, bringing “AI pair programming” into everyday development workflows.

Key specs

Form: Editor plug-in (VS Code, Visual Studio, JetBrains and others)
Models: Models from several vendors
Modality: Text, code in; code out

Capabilities

Beginner

Code Completion & Assistant

Continue, explain and revise code inside the editor

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Beginner

Code Generation

Write runnable code straight from a description

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Related concepts

Intermediate

Agents & Tool Use

Let a model do more than answer: search, call APIs, run code — and decide the next step from what came back

AI Engineering, Safety & Ethics

Expert

Prompting & Alignment

Making a model helpful, honest and harmless is harder than simply making it bigger

NLP & Large Language Models

Intermediate

Inference Optimization & Serving

Training happens once; inference happens a billion times a day — and serving is torn between fast first tokens and high throughput, which usually pull against each other

AI Engineering, Safety & Ethics