The AI coding assistant market has matured fast. What started as a neat autocomplete feature is now a full category of tools that write functions, refactor files, run terminal commands, and argue with you about architecture. GitHub Copilot was first, but it is no longer obviously the best. Here is where things actually stand in June 2026.
See also: Best AI Coding Assistants 2026 (full reviews) on our sister site.
For years the case for Copilot was simple: it was the only mature option, and $10/month was a no-brainer. In June 2026, GitHub switched to token-based billing for power users, and several developers reported their monthly bills jumping from $29 to hundreds. Beyond the pricing uncertainty, the alternatives have built features Copilot still lacks: proper agentic multi-file editing, embedded terminal control, and the ability to use multiple frontier models without leaving the tool. If you are doing anything more complex than single-file completions, the comparison looks different now.
| Tool | Best for | Free tier | Paid from |
|---|---|---|---|
| Cursor | Agentic coding, complex refactors | Limited (Hobby) | $20/mo |
| Claude Code | Terminal-first, long context tasks | No | $20/mo (Claude Pro) |
| Windsurf | AI-first IDE, smooth UX | Limited | $15/mo |
| Codeium | Free completions, plugin users | Unlimited completions | $15/mo (Pro) |
| Tabnine | Enterprise, private codebase | No | $39/user/mo |
| GitHub Copilot (ref) | VS Code / existing IDE users | Limited | $10/mo |
Cursor is an AI-first fork of VS Code, which means your extensions and keybindings carry over and the adjustment period is shorter than you expect. The agent mode can take a multi-step task, break it into subtasks, write code across multiple files, run tests, and fix the failures. That is genuinely new territory. The Pro plan at $20/month includes access to Claude Opus 4.6, GPT-4o, and other frontier models with a generous request allocation. The free Hobby plan exists but hits its limits quickly in real use.
Price: Hobby (free, limited), Pro from $20/month.
Claude Code is Anthropic's terminal-based coding tool. It is different from the others here: it runs in your shell rather than inside an editor, and it can read your full codebase, run commands, edit files, and work through multi-step tasks without constant supervision. The 200,000-token context window means it can hold an entire medium-sized project in mind at once. It requires a Claude Pro subscription ($20/month) or an API key. Serious users often run it on Max 5x ($100/month) for heavier workloads.
Price: Requires Claude Pro ($20/mo) or API credits.
Windsurf (formerly Codeium's flagship editor) is the most polished AI-first IDE that is not Cursor. The Cascade agent handles multi-file edits and iterates based on test output. At $15/month for Pro, $5 cheaper than Cursor, it is a legitimate alternative, particularly for developers who find Cursor's interface busy. The free tier includes a limited number of premium prompts per month and unlimited code completions.
Price: Free (limited premium prompts), Pro from $15/month.
Codeium's plugin version (distinct from the Windsurf editor) offers unlimited code completions on the free individual plan, which puts it in a different category from the others. If your main use is autocomplete while writing code in your existing editor (VS Code, JetBrains, Neovim), Codeium slots in at no cost. The Pro plan at $15/month adds more capable chat and multi-file context. It is the right pick if you want Copilot-style completions without paying for them.
Price: Free (unlimited completions), Pro from $15/month.
Tabnine is aimed squarely at enterprise teams where code never leaves the building. It can be deployed on-premises, trained on your own codebase, and run in an air-gapped environment. The price reflects that: $39/user/month with an annual commitment, no monthly option. For teams at regulated companies (finance, healthcare, defence), the privacy guarantees are worth paying for. For individual developers or small teams, the cost and complexity are hard to justify when Cursor or Codeium exist.
Price: From $39/user/month (annual commitment required).
Pick Cursor for the most capable agentic coding experience, Claude Code if you prefer the terminal and need massive context windows, Windsurf if you want a slightly cheaper Cursor-style IDE, Codeium if you want free completions in your current editor, and Tabnine if enterprise privacy requirements make the other options a non-starter.
At $10/month for Pro, Copilot is the best value for pure cost per month. But the June 2026 switch to token-based billing for heavy users has made it unpredictable. Developers who prompt heavily report bills jumping significantly. Cursor Pro at $20/month is more predictable for those use cases.
Codeium offers a generous free individual tier with unlimited code completions. Copilot itself has a limited free tier now. For a fully capable free tool, Codeium is the strongest option.
For multi-file editing, agentic tasks, and complex refactors, most developers who have tried both say Cursor wins. For quick completions in an existing IDE without changing your workflow, Copilot is easier to slot in.
Codeium rebranded to Windsurf in late 2024. The Windsurf IDE and the standalone Codeium plugin are now separate products from the same company, with Windsurf being the flagship AI-first editor.