Overview
GitHub Copilot is an AI programming assistant jointly developed by GitHub and OpenAI, with the largest user base to date. Launched in 2021, it surpassed **20 million** paid users in 2026, making it the de facto standard for enterprise AI programming—almost every company using GitHub relies on it.
By 2026, Copilot has fully transformed from a "line-level completion" tool into an **Agentic Coding platform**: **Agent Mode** (autonomous multi-file editing + running tests + self-correction within the IDE), **Copilot Workspace** (end-to-end delegation from Issue to PR), and **Copilot Coding Agent** (directly assigning tasks to the Agent on the GitHub web interface, running in Actions, and automatically opening PRs) are now the default experience. On the model side, the June Build conference announced **Project Polaris** (Microsoft's self-developed MoE + Maia accelerator), which replaced GPT-4 Turbo as Copilot's default inference engine starting August 2026, with a 3-month GPT-4 fallback period.
On the billing side, **starting June 1, 2026, the pricing model shifted from "request count" to "GitHub AI Credits" billed by token**—the Pro monthly fee remains unchanged but the quota is replaced by Credits, with overage charged per usage. This is a structural adjustment to accommodate the surge in computing power demands in the Agent era.
Key Features
- Agent Mode (Autonomous Programming within IDE): One-click activation of Agent in VS Code / JetBrains, autonomously editing multiple files, running tests, reading errors, and self-repairing, capable of handling long tasks with dozens of steps
- Copilot Coding Agent (Cloud Task Delegation): Assign Issues directly to @copilot on the GitHub web interface, run the Agent in Actions, automatically open PRs, and iterate based on reviews—get Copilot to work without opening the IDE
- Copilot Workspace (Task-Driven Development): Automatically generate a complete plan from an Issue → multi-file changes → tests → PR, GA at Build on June 2, 2026
- Copilot Chat + Edits: Conversational programming within the IDE + multi-file inline editing, serving as the second daily entry point beyond completions
- Project Polaris Self-Developed Model: Microsoft MoE + Maia accelerator, replacing GPT-4 Turbo as Copilot's default engine starting August 2026, with significant improvements for niche languages like Rust/Haskell, free upgrade for all paid tiers
- Copilot Extensions: Third-party tools like Jira, Datadog, ServiceNow, and Sentry can be directly invoked by the Agent within Copilot sessions as extensions
- Full IDE / Full Language Coverage: Full coverage across VS Code, JetBrains suite, Neovim, Visual Studio, Xcode, and virtually all major programming languages
Use Cases
- Daily code completion and refactoring for VS Code / JetBrains users
- Batch delegation of GitHub Issues to AI using Coding Agent (dependency updates, test completion)
- Test-driven development and large multi-file changes with Workspace
- Adding AI automation to existing GitHub + Actions workflows for enterprise teams
- Free usage for students / open-source maintainers as an entry-level AI programming tool
Pros
- Largest user base and highest enterprise adoption rate, with over 20 million paid users in 2026
- Native GitHub integration (Issue / PR / Actions / RBAC) is an advantage that other tools cannot replicate
- Coding Agent makes "assigning tasks to AI on GitHub web" a mainstream experience, covering scenarios not addressed by IDE tools like Cursor
- Improved model cost structure and significant performance gains for niche languages after Project Polaris launch
- Free for students and popular open-source maintainers, covering universities and communities
Pricing
Free (50 Agent actions / 2000 completions per month, limited model); Pro $10/month or $100/year (Agent Mode, Workspace, Coding Agent, Polaris default engine); Pro+ $39/month (unlimited frontier models, higher Agent quota); Business $19/seat/month (team management + policy control); Enterprise $39/seat/month (codebase indexing + advanced security + SSO + audit). Free for students and popular open-source maintainers. **Major billing model change effective June 1, 2026**: Transition from fixed quota subscription to "GitHub AI Credits" billed by usage—base monthly fee unchanged, but "premium request units" replaced by AI Credits, calculated based on actual input/output/cached token consumption of the model, with differentiated pricing across models. This is because Copilot is evolving from a single assistant to a multi-step autonomous coding Agent, significantly increasing computing power demands. Users can continue using Credits beyond the subscription quota; the Polaris model upgrade is free for all paid tiers, with automatic migration and a 3-month GPT-4 fallback period.
Summary
GitHub Copilot is the "enterprise default option" in the AI programming space—largest user base, most complete ecosystem, highest compliance, and most competitive pricing. If your team is already on GitHub, enabling Copilot Pro / Business is almost a zero-cost decision. **The only thing to watch out for is the AI Credits billing by token starting June 1, 2026**—heavy users of Agent Mode / Workspace may see increased monthly costs. It's recommended to first observe usage on the Free or Pro tier before choosing a plan. For those seeking a more extreme "AI-native IDE" experience, consider using Cursor or Claude Code alongside: Copilot handles daily tasks and enterprise workflows, while Cursor / Claude Code handle heavy coding and complex autonomous tasks.
Version History
- Copilot 2026 / Project Polaris (2026): Coding Agent GA, Workspace GA, AI Credits billing by token launched; Project Polaris self-developed model replaces GPT-4 Turbo as default engine starting August
- Copilot Agent Mode / Edits (2025): Agent Mode and multi-file Edits within IDE launched, upgrading from a completion tool to an Agentic Coding platform
- Copilot Chat / Workspace Beta (2023-2024): Conversational programming + Workspace Beta, laying the foundation for the transition from "completion" to "task-driven development"
- Copilot 1.0 (2021-2022): Joint release by GitHub × OpenAI, line-level / block-level code completion, ushering in the era of AI programming