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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Coding
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Writing
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Replicate S | Lovable A | Claude S | Sora A | |
|---|---|---|---|---|
| Tagline | Run any open-source AI model with an API call. | Build a full app from a prompt. Stripe-ready. | Anthropic's flagship — best reasoning + longest useful context. | OpenAI's video model. Long clips, cinematic quality. |
| Category | Dev Platform | Design | Chatbots | Video |
| Pricing | Pay per second of compute | Free + $25-$100/mo | Free + $20/mo Pro + team/enterprise | Included with ChatGPT Plus/Pro |
| Best for | Developers using open-source models (Flux, SDXL, Whisper, etc). | Non-devs + solopreneurs shipping MVPs. | Long writing, code, careful thinking, documents over 50 pages. | ChatGPT subscribers experimenting with cinematic shots. |
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| Kai's verdict | S-tier for open-source model APIs. The default in this space. | A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs. | S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work. | A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros. |
| Link | Open → | Open → | Open → | Open → |