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.Pick tools (4 selected)
coding
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productivity
writing
marketing
Claude S | Replicate S | Devin A | Claude Code S | |
|---|---|---|---|---|
| Tagline | Anthropic's flagship — best reasoning + longest useful context. | Run any open-source AI model with an API call. | Cognition Labs' autonomous coding engineer. | Anthropic's CLI agent. Opus-powered, operates on your repo directly. |
| Category | chat | dev platform | agents | coding |
| Pricing | Free + $20/mo Pro + team/enterprise | Pay per second of compute | $500/mo | Part of Claude Pro/Max/Team plans |
| Best for | Long writing, code, careful thinking, documents over 50 pages. | Developers using open-source models (Flux, SDXL, Whisper, etc). | Engineering teams offloading tickets. Ops/platform work. | Developers who want an agent, not autocomplete. Large refactors, tests, docs. |
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| Kai's verdict | S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work. | S-tier for open-source model APIs. The default in this space. | A-tier for the right use case. Not for solo devs. If you manage engineers, try one license. | S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement. |
| Link | Open → | Open → | Open → | Open → |