Compare AI tools
Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Aider A | GitHub Copilot B | Stripe Link A | Claude Code S | |
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| Tagline | Terminal-based AI pair programmer. Git-aware, model-flexible. | Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration. | A digital wallet that lets AI agents spend on your behalf — without ever seeing your actual card number. | Anthropic's CLI agent. Opus-powered, operates on your repo directly. |
| Category | Coding | Coding | Agents | Coding |
| Pricing | Free (open source) + whatever API you use | Free (limited) + $10/mo Pro + $19/mo Business | Free for consumers; standard Stripe per-transaction fees for merchants | Part of Claude Pro/Max/Team plans |
| Best for | Developers who want open-source tooling with full control. | Teams with GitHub already. Devs who don't want to change IDEs. | Anyone running autonomous AI agents (shopping bots, booking assistants, personal AI) who wants delegated payment capability without handing over raw card data. | Developers who want an agent, not autocomplete. Large refactors, tests, docs. |
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| Kai's verdict | A-tier. The right answer if you want open-source + terminal-native + model-agnostic. | B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't. | Stripe Link is the most credible first move toward a real agentic payment layer — the one-time-use card model is genuinely clever, and the existing merchant network gives it a head start no startup wallet can match. But the 'approve every transaction' UX will get old fast, and the hard part (autonomous spending with guardrails) is still on the roadmap. (Verdict pending Phi's full review.) | S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement. |
| Link | Open → | Open → | Open → | Open → |