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
image
productivity
writing
marketing
Cursor S | Runway S | Replicate S | Claude Code S | |
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| Tagline | VS Code fork that made AI coding actually work. | The pro's AI video tool. Gen-4 is the current bar. | Run any open-source AI model with an API call. | Anthropic's CLI agent. Opus-powered, operates on your repo directly. |
| Category | coding | video | dev platform | coding |
| Pricing | Free + $20/mo Pro + $40/mo Business | Free + $15-$95/mo | Pay per second of compute | Part of Claude Pro/Max/Team plans |
| Best for | Developers. Non-developers who want to ship working code. | Marketing video, pitch decks, b-roll, creative shorts. | Developers using open-source models (Flux, SDXL, Whisper, etc). | Developers who want an agent, not autocomplete. Large refactors, tests, docs. |
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| Kai's verdict | S-tier for coding. If you write code of any kind, this pays back the $20 in a day. | S-tier. Market leader with reason. Start here for serious video. | S-tier for open-source model APIs. The default in this space. | S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement. |
| Link | Open → | Open → | Open → | Open → |