Comparison · updated quarterly
AI coding assistants, compared
Eight tools — Cursor, Claude Code, GitHub Copilot, Windsurf, Aider, Cline, Continue, Replit Agent — side-by-side on price, capabilities, model support, and open-source status. Every field cites its source. Feature parity is high in 2026; the meaningful differences are workflow-shaped.
| Tool ↑ | Vendor | Interface | Entry price | Open source | Autonomous | MCP | Local models | Compare |
|---|---|---|---|---|---|---|---|---|
Aider The reference open-source terminal coding agent. | Paul Gauthier | CLI | Free (BYO API key) | ✓ Apache 2.0 | ✓ | — | ✓ | |
Claude Code Anthropic's terminal-native coding agent. | Anthropic | CLI | Included with Claude Pro ($20/mo) | — Included with Claude Pro / Max subscriptions | ✓ | ✓ | — | |
Cline Open-source autonomous agent, VS Code native. | Cline (open source) | IDE extension | Free (BYO API key) | ✓ Apache 2.0 | ✓ | ✓ | ✓ | |
Continue The oldest open-source IDE assistant, still going. | Continue (open source) | IDE extension | Free (BYO API key) | ✓ Apache 2.0 | ◐ | ✓ | ✓ | |
Cursor The AI-native IDE that dominated the 2024–25 wave. | Anysphere | IDE | $20/mo Pro | — | ✓ | ✓ | ◐ | |
GitHub Copilot The original — now with an agent mode. | GitHub (Microsoft) | IDE extension | $10/mo Individual (Pro) | — | ✓ | ◐ | — | |
Replit Agent The zero-to-one web builder. | Replit | Web app | Included with Replit Core ($15/mo) | — | ✓ | — | — | |
Windsurf The IDE that pushed the Cascade agent pattern. | Codeium | IDE | Free tier | — | ✓ | ✓ | — |
For quality benchmarks
Send your reader to the source
We don't publish our own quality scores yet — fabricating numbers is what got a lot of AI-content sites de-indexed. These public leaderboards run under disclosed methodology and update frequently:
- Aider Polyglot leaderboard →Aider's own multi-language edit benchmark. Model + agent scores updated with every release.
- SWE-bench Verified →Real GitHub issues resolved end-to-end. The industry benchmark for coding-agent capability.
- LiveCodeBench →Contamination-resistant leetcode-style problems, refreshed monthly.
- Terminal-Bench →Multi-step terminal-agent tasks — closer to what CLI-based assistants actually do.
Editorial context
Vibe Coding's Quiet Revolution — a year-one audit
Twelve months of AI-native development — measured in shipping data, code review depth, and incident rates. The context behind why this comparison exists.
Frequently asked
How was this comparison built?
Every field — pricing, capabilities, interface, model support, open-source status — is sourced from each tool's official documentation, pricing page, or product surface as of the verification date shown at the bottom of the page. Where a metric would require an internal benchmark we haven't run (latency on your codebase, quality on your PR shape), we deliberately leave it out and instead point at public leaderboards that publish under a disclosed methodology.
Why don't you publish your own quality benchmark scores?
Because we haven't run controlled benchmarks yet — and the wrong thing to do would be to fabricate numbers or repeat scores whose methodology we can't stand behind. Aider's polyglot leaderboard, SWE-bench Verified, LiveCodeBench, and Terminal-Bench are all public, well-documented, and frequently updated. Send your reader there rather than trust ours.
How often is this page updated?
Quarterly at minimum, plus any time a tool ships a materially different pricing or capability change we notice. Each row shows the verification date. If you spot a stale field, email corrections@thestackstories.com — we typically ship the correction within 48 hours.
Which tool would you pick for a mid-size engineering team in 2026?
For an IDE-first team standardising on one tool, Cursor still wins on breadth and Windsurf on price. For terminal-native workflows, Claude Code and Aider both hold up well — Claude Code if you're already on Anthropic, Aider if you want full model choice and open source. For governed enterprise rollouts, GitHub Copilot is still the incumbent for a reason (org-scale SSO, audit, policy). None of this is one-size-fits-all — the point of the table is to help you compare on the axes that matter to your team.
Is any tool objectively 'best'?
No. Feature parity in this category is high in 2026, and the meaningful differences are workflow-shaped: do you live in the terminal or the IDE, do you need MCP servers, do you require local model support for compliance reasons, do you need enterprise SSO. The table sorts and filters on those axes so you can eliminate options quickly.
How can I contribute a correction or missing tool?
Email corrections@thestackstories.com. Include the field, the source URL, and (if a new tool) links to its official documentation and pricing page. We add tools that meet the criteria: (1) actively maintained, (2) production-usable, (3) public pricing or clearly-free.
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