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 | Rows A | OpenAI Voice / Realtime S | |
|---|---|---|---|---|
| Tagline | Run any open-source AI model with an API call. | AI avatar videos. Record once, speak any language. | Spreadsheets with AI + live integrations baked in. | ChatGPT's voice + the Realtime API for developers. |
| Category | Dev Platform | Video | Data | Voice |
| Pricing | Pay per second of compute | Free + $24-$65/mo | Free + $19-$89/user/mo | Voice included with ChatGPT Plus; Realtime API by usage |
| Best for | Developers using open-source models (Flux, SDXL, Whisper, etc). | Course creators, multilingual marketers, anyone scaling video content. | Ops teams, marketers, anyone building dashboards from multiple sources. | Voice chat users, developers building voice agents on OpenAI. |
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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. | A-tier. The most interesting spreadsheet in years. Great for ops dashboards. | S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement. |
| Link | Open → | Open → | Open → | Open → |