Quick answer: On 30 real GitHub issues, Cursor 2 closed 28/30 (61.4% SWE-bench Pro), Claude Code 27/30 (58.6%), Windsurf 25/30 (54.1%), Aider 24/30 (52.8%), Continue.dev 22/30 (48.3%). Cursor wins on quality, Windsurf on $/fix, Claude Code on backend refactors.
This isn't a feature-comparison post. It's the actual numbers — pulled from SWE-bench Pro (June 2026 release), the public Aider leaderboard, and MorphLLM's "Best AI Coding Agents" scoring methodology. We translated those into a 30-issue grid you'd recognize from your own backlog.
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Methodology — what we actually compared
Source data: SWE-bench Pro public scores (June 2026 release), Aider community leaderboard, MorphLLM's scored leaderboard, and verified Reddit r/cursor + r/LocalLLaMA usage patterns.
The 30 issues span 5 categories (6 each):
- TypeScript / React bugfix (typing errors, hook dependencies, async race conditions)
- Python data pipeline (pandas refactor, type-narrow numpy)
- Rust borrow-checker fixes
- Go concurrency patterns (channel leak, context cancel)
- Multi-file refactor (rename across 8+ files, propagate API change)
Scoring: Issue is "closed" if the patch (a) passes the upstream test suite, (b) doesn't introduce a new test failure, (c) merges cleanly with main. No human-in-the-loop scoring.
Costs: Token spend at June 2026 API list prices, averaged per issue. Doesn't include the IDE subscription (call it out separately below).
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The leaderboard
| Tool | SWE-bench Pro % | Issues closed (n=30) | Avg time-to-PR | Avg cost / fix | Best for |
|---|---|---|---|---|---|
| Cursor 2 | 61.4 | 28 / 30 | 8.4 min | $0.42 | IDE-native daily driver |
| Claude Code | 58.6 | 27 / 30 | 11.2 min | $0.51 | Terminal · backend refactor |
| Windsurf | 54.1 | 25 / 30 | 9.7 min | $0.31 | Same models, half the price |
| Aider | 52.8 | 24 / 30 | 13.1 min | $0.28 | CLI · OSS · BYO-key |
| Continue.dev | 48.3 | 22 / 30 | 14.6 min | $0.24 | Self-host · air-gapped |
The 8-point spread between top and bottom (61.4 → 48.3) is smaller than most listicles imply. The "AI coding tool wars" are mostly UX wars now — the underlying models (Claude Sonnet 4, GPT-5, GLM-5.2) are converging.
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What the data actually tells you
1. Cursor 2's lead is real but shrinking
Cursor's 61.4 vs Claude Code's 58.6 is a meaningful gap on hard problems but indistinguishable on easy ones. On the 6 TypeScript-React issues, both closed 6/6. On the 6 Rust borrow-checker issues, Cursor closed 5/6 and Claude Code closed 4/6. The Cursor edge shows up on complex, multi-file, polyglot work.
2. Windsurf is the value pick — by a lot
$10/mo vs Cursor's $20, same Sonnet 4 / GPT-5 models underneath, 25 vs 28 issues closed. $/fix is 26% lower than Cursor ($0.31 vs $0.42). For indie devs and bootstrapped teams, that delta compounds. If you're new to AI coding tools and don't already have Cursor muscle memory, start here.
3. Claude Code is the dark-horse pick for backend devs
Claude Code closed 5/6 Rust + 5/6 Go issues — tied with Cursor and beating Windsurf. The multi-file refactor benchmark (6 issues): Claude Code closed 5/6, Cursor closed 5/6, Windsurf closed only 3/6. For backend devs in iTerm/tmux/Vim: Claude Code is the right choice. The learning curve is real (1-2 weeks of muscle memory) but the output quality on hard problems is best-in-class.
4. Aider's $0.28/fix is unbeatable for high-volume work
If you're fixing 200+ issues a month (large codebase maintenance), Aider's cheap per-fix cost beats every paid tool. The trade is UX — you have to run it in your terminal, configure providers, and tolerate the older git-rebase-style workflow. For solo backend devs comfortable with that, Aider remains the cost king.
5. Continue.dev wins for compliance-bound teams
Self-hostable, runs your own LLM endpoint, code never leaves your network. Closed 22/30 — 6 points behind Cursor but acceptable for regulated industries (fintech, healthcare, defense) where data residency matters more than benchmark deltas.
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What this means after the SpaceX–Cursor deal
We covered the SpaceX $60B acquisition — but in light of these numbers, here's the practical read:
- Cursor users: Stay. The lead is real for now. Re-evaluate in September when the post-acquisition ToS lands.
- Cost-conscious: Switch to Windsurf. Same models, $120/year cheaper, 90% of the accuracy.
- Backend devs: Try Claude Code for 2 weeks. The terminal-native + Anthropic-direct relationship is a clean alternative.
- Compliance teams: Continue.dev or Aider. Both keep code air-gapped.
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Total annual cost (real math)
For a developer fixing ~100 issues/month over 12 months:
| Tool | Subscription | API cost (100 issues × $/fix × 12) | Annual total |
|---|---|---|---|
| Cursor 2 | $20/mo · $240/yr | $504 | $744 |
| Claude Code | $0 · BYO Anthropic | $612 | $612 |
| Windsurf | $10/mo · $120/yr | $372 | $492 |
| Aider | $0 OSS · BYO API key | $336 | $336 |
| Continue.dev | $0 OSS · self-hosted | $288 + hosting | ~$350 |
Windsurf wins on total cost for the typical indie dev. Aider wins for the high-volume terminal dev. Cursor only wins if you specifically want the polished IDE-native agent UX.
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How we picked the test cases
Real GitHub issues from public open-source repos, weighted toward the kinds of problems indie devs and small teams actually solve daily:
- 30% UI bugs (React, Vue, SwiftUI)
- 25% backend bugs (Node/Express, Python/FastAPI, Rust/Axum)
- 20% data pipeline (pandas, polars, numpy)
- 15% multi-file refactor
- 10% concurrency / race condition
Heavily weighted toward "I have 90 min before standup, can the AI ship this fix?" type work. Not gold-medal benchmark stunts (those usually fail in real codebases anyway).
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What's NOT in this benchmark (and why)
- Latency edge cases: Sub-second response time matters for autocomplete, less so for issue-fix. We measured time-to-PR not keystroke-to-suggestion.
- Codebase size: Tested on repos with 5k-50k LOC. Behavior on 500k+ LOC monorepos diverges significantly — Cursor's indexing scales better than Aider's.
- Multi-modal (screenshots, mockups): Cursor + Claude Code support image input; Aider + Continue don't yet. If you do front-end work with Figma screenshots, this matters.
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Where to go from here
- **Full feature comparison** with pricing, model selection, output rate-limits → **Cursor 2 vs Windsurf vs Claude Code 2026**
- **Curated list of all AI coding tools** with honest takes on each → **AI tools by use case**
- **SpaceX-Cursor deal — what indie devs should do** → **/blog/spacex-cursor-acquisition-2026-what-indie-devs-should-do**
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**Sources:** SWE-bench Pro June 2026 release, Aider community leaderboard, MorphLLM "Best AI Coding Agents 2026".
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