Most people’s mental model of Copilot is still “the autocomplete tool from 2022.” That’s badly out of date. In 2026 it’s a sprawling product family — and understanding what’s actually in it (and what it costs) is the difference between using it well and being surprised by your bill.
GitHub Copilot is Microsoft’s AI coding assistant — and as of 2026, the most-deployed AI coding tool in the world. It started in 2022 as inline code completion powered by OpenAI Codex. Since then it has grown into something considerably bigger: inline completions still, plus IDE chat, an agent mode for multi-file edits (now generally available in both VS Code and JetBrains), the Coding Agent that takes a GitHub issue and returns an autonomous pull request, the Copilot CLI for terminal workflows, Spaces for curated project context, a code-review bot, and Agent HQ — where Claude and Codex appear as first-party coding agents inside GitHub itself.
It’s also multi-model now. Behind the same UI you can route to GPT-5.4, Claude Sonnet 4.6, Gemini 3.1 Pro, and the o3 series — with Claude Opus 4.7 reserved for Pro+, Business, and Enterprise tiers (Pro lost Opus access in April 2026). That matters: Copilot increasingly competes on the orchestration around the same models that Claude Code and Cursor use, rather than on its own model. We pin the right model per task rather than trusting auto-selection.
And the bill model is shifting too. As of June 1, 2026, Copilot moved from request-based to usage-based billing — meaning the cost story has fundamentally changed and will continue to evolve. Across five tiers (Free, Pro at $10/mo, Pro+ at $39/mo, Business at $19/user/mo, Enterprise at $39/user/mo), what you actually pay depends increasingly on which models you use and how intensively. We architect for that.