Both are AI-first code editors built on VS Code. The differences are in the model, context strategy, and pricing. Here's what actually matters for your workflow.
If you only have 30 seconds: Windsurf wins on out-of-the-box agentic flow and price. Cursor wins on model choice, context depth, and MCP integrations. Claude Code is in a different category entirely.
Best out-of-the-box agent
Most customizable AI workflow
Most capable agentic coding
Every meaningful dimension compared. Last updated April 2025.
| Feature | Windsurf | Cursor |
|---|---|---|
| Price | Free (200 credits/mo) · Pro $15/mo · Ultimate $60/mo | Free (2-week trial) · Pro $20/mo · Business $40/user/mo |
| AI Model | Windsurf SWE-1 (proprietary) + Claude + GPT-4o | GPT-4o, Claude 3.5 Sonnet, Gemini (user selectable) |
| Agentic Feature | Cascade — autonomous multi-file agent | Composer — multi-file chat + Agent mode |
| Tab Completion | Supercomplete (multi-line, context-aware) | Tab (strong, predictive) |
| Context Window | 8k tokens (Cascade) | 64k tokens (with extended context) |
| MCP Support | No (as of 2025) | Yes — full MCP server support |
| Codebase Indexing | Yes (full repo) | Yes (full repo) |
| Rules File | .windsurfrules | .cursorrules |
| CLAUDE.md Support | No | No (Claude Code only) |
| Base Editor | VS Code fork | VS Code fork |
| Extensions | VS Code compatible | VS Code compatible |
| Team Features | Shared snippets, workspace | Teams dashboard, admin controls |
| Best For | Autonomous agent tasks, boilerplate generation | Customizable AI workflows, large codebases |
Windsurf (by Codeium) was built from the ground up for agentic coding. The bet: instead of making the context window bigger, make the agent smarter about what to do with less.
Windsurf's standout feature. Cascade autonomously writes multi-file changes, runs terminal commands, reads error messages, and fixes issues in a continuous loop — without you needing to guide each step. It reads your intent and executes.
Use case: "Refactor this module to use async/await throughout" — Cascade handles the whole thing, including test files.
Windsurf's proprietary model trained specifically on software engineering tasks. On certain agentic coding benchmarks, SWE-1 outperforms Claude and GPT-4o — especially for multi-step tasks and code repair loops.
This is Windsurf's moat: a specialized model, not a general-purpose LLM bolted onto an IDE.
Windsurf's context file equivalent to .cursorrules. Lives in your project root. Tell Windsurf your stack, coding conventions, what to never do, and domain-specific patterns. Cascade loads it automatically at session start.
The two gaps that matter: 8k context window limits Cascade on very large codebases, and no MCP support means you can't connect Windsurf to databases, browser automation, or external APIs the way Cursor + MCP allows.
Cursor (by Anysphere) took a different bet: give developers the freedom to choose their model, maximize context depth, and build a full ecosystem around the IDE. It's the most customizable AI code editor available.
Cursor's multi-file generation tool. Unlike a single-file edit, Composer shows you a full diff of every file it wants to change before applying. You review, adjust, and approve — making it more surgical than Cascade but less autonomous.
Agent mode adds autonomy: Composer can run terminal commands and iterate, similar to Cascade.
Switch freely between Claude 3.5 Sonnet, GPT-4o, Gemini 2.0 Flash, or bring your own API key. This is Cursor's superpower — you're not locked to one provider's capabilities or pricing.
When Claude 3.7 drops or a better model ships, Cursor users get it immediately. Windsurf users wait for Codeium to integrate it.
Cursor supports MCP (Model Context Protocol) servers natively. This means Claude inside Cursor can connect to your database, control a browser via Playwright, query APIs, and read real-time data — capabilities that go far beyond what .cursorrules alone enables.
Cursor's extended context mode gives the AI up to 64k tokens of codebase awareness. On large monorepos, this translates to understanding cross-module dependencies, catching subtle regressions, and refactoring across many files with precision.
Every major AI code editor has a rules file that tells the AI about your project. The format is similar — the differences are in nesting, depth, and how each tool loads them.
| Windsurf | Cursor | Claude Code | |
|---|---|---|---|
| Context File | .windsurfrules | .cursorrules | CLAUDE.md |
| Location | Project root | Project root | Project root (+ any subdirectory) |
| Nested Files | No | No | Yes — CLAUDE.md per directory |
| Format | Markdown | Markdown | Markdown |
| Auto-loaded | Yes | Yes | Yes |
| Brainfile Supports | ✅ Yes | ✅ Yes | ✅ Yes |
The honest answer depends less on which editor is "better" and more on what you're actually building every day.
Cascade handles multi-file boilerplate generation better than Composer out of the box. Tell it "create a full CRUD module for users with TypeScript, Zod validation, and Prisma" — Cascade executes the entire thing autonomously.
Model flexibility is Cursor's superpower. Switch between Claude 3.5 Sonnet for complex reasoning, GPT-4o for speed, Gemini for long context, or bring your own API key. Windsurf locks you to their model stack.
MCP support is Cursor-only as of 2025. If your workflow involves connecting the AI to a database, running browser automation, or querying external APIs from inside the editor — Cursor is the only choice between these two.
For maximum autonomous capability on complex multi-step tasks, Claude Code (terminal-native, no IDE) outperforms both Windsurf and Cursor. It runs shell commands, iterates on failures, and uses CLAUDE.md for deep project context.
Whether you're using .windsurfrules or .cursorrules, you're dealing with the same unsolved problem: writing context files that actually work requires expertise most developers don't have time for.
Generic rules don't work. Most developers write rules like "use TypeScript" and "follow best practices." These are useless — the AI already knows this. What actually moves the needle is domain-specific context: your architecture decisions, your team's conventions, what NOT to do and why.
Rules go stale within weeks. Your stack evolves, your conventions change, new patterns emerge. Nobody maintains .windsurfrules or .cursorrules once they're written. Within a month, the AI is working from outdated context.
You'd need to maintain two separate files if you switch tools. .windsurfrules and .cursorrules are different files. If you use both editors (or your team uses different ones), you're maintaining duplicates that drift apart.
Brainfile's template library solves the context file problem once. Professional-grade rules files for your role, maintained monthly, with format-specific versions for every major AI tool.
Stop writing generic rules that the AI ignores. Brainfile gives you professional-grade context templates maintained by engineers who've tested every edge case.
Get our top .windsurfrules and .cursorrules templates for free. No credit card. Just working context files you can deploy today.