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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 | Kling A | Sora A | Hex A | |
|---|---|---|---|---|
| Tagline | Run any open-source AI model with an API call. | Kuaishou's video model. The surprise standout. | OpenAI's video model. Long clips, cinematic quality. | Modern data notebook with Magic AI assistant. |
| Category | Dev Platform | Video | Video | Data |
| Pricing | Pay per second of compute | Credit-based, free trial | Included with ChatGPT Plus/Pro | Free + $28+/user/mo |
| Best for | Developers using open-source models (Flux, SDXL, Whisper, etc). | Anyone who wants top-tier video quality for less. | ChatGPT subscribers experimenting with cinematic shots. | Data teams at startups + enterprises. |
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| Kai's verdict | S-tier for open-source model APIs. The default in this space. | A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class. | A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros. | A-tier for data teams. S-tier if you already live in SQL + Python. |
| Link | Open → | Open → | Open → | Open → |