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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Replicate S | GitHub Copilot B | Stripe Link A | Perplexity S | |
|---|---|---|---|---|
| Tagline | Run any open-source AI model with an API call. | 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. | AI search done right. Cited answers, not chat theater. |
| Category | Dev Platform | Coding | Agents | Research |
| Pricing | Pay per second of compute | Free (limited) + $10/mo Pro + $19/mo Business | Free for consumers; standard Stripe per-transaction fees for merchants | Free + $20/mo Pro |
| Best for | Developers using open-source models (Flux, SDXL, Whisper, etc). | 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. | Replacing Google for any question where you want a cited answer in seconds. |
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| Kai's verdict | S-tier for open-source model APIs. The default in this space. | 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 for search. I use it before Google now. If you're still Googling everything, try this for a week. |
| Link | Open → | Open → | Open → | Open → |