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 | HeyGen S | v0 S | Manus S | |
|---|---|---|---|---|
| Tagline | Run any open-source AI model with an API call. | AI avatar videos. Record once, speak any language. | Vercel's AI-powered UI generator. Prompt to shadcn component. | Autonomous AI agent that actually finishes tasks. |
| Category | Dev Platform | Video | Design | Agents |
| Pricing | Pay per second of compute | Free + $24-$65/mo | Free + $20/mo | Free tier + $39-$199/mo |
| Best for | Developers using open-source models (Flux, SDXL, Whisper, etc). | Course creators, multilingual marketers, anyone scaling video content. | Frontend devs, PMs prototyping UIs, anyone on Next.js. | People who want to hand off tasks entirely — trip planning, research, spreadsheet building. |
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| Kai's verdict | S-tier for open-source model APIs. The default in this space. | S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code. | S-tier. If you're on Vercel/shadcn, this is cheating. | S-tier in the agent category. The first one I'd give to a non-technical friend. |
| Link | Open → | Open → | Open → | Open → |