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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Productivity
Writing
Marketing
Runway S | Sora A | HeyGen S | |
|---|---|---|---|
| Tagline | The pro's AI video tool. Gen-4 is the current bar. | OpenAI's video model. Long clips, cinematic quality. | AI avatar videos. Record once, speak any language. |
| Category | Video | Video | Video |
| Pricing | Free + $15-$95/mo | Included with ChatGPT Plus/Pro | Free + $24-$65/mo |
| Best for | Marketing video, pitch decks, b-roll, creative shorts. | ChatGPT subscribers experimenting with cinematic shots. | Course creators, multilingual marketers, anyone scaling video content. |
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| Kai's verdict | S-tier. Market leader with reason. Start here for serious video. | A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros. | S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code. |
| Link | Open → | Open → | Open → |