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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Productivity
Writing
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Lex A | Replicate S | ChatGPT Operator B | Fireflies A | |
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| Tagline | Google Docs with an AI collaborator baked in. | Run any open-source AI model with an API call. | OpenAI's browser agent. Clicks and types on websites for you. | Sales-focused meeting AI with CRM integration. |
| Category | Writing | Dev Platform | Agents | Meetings |
| Pricing | Free + $12/mo | Pay per second of compute | Included with ChatGPT Pro $200/mo | Free + $10-$19/user/mo |
| Best for | Essays, long-form drafts, thinking on the page. | Developers using open-source models (Flux, SDXL, Whisper, etc). | Power users willing to pay $200/mo for a browser bot. | Sales teams, customer success, anyone running many discovery calls. |
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| Kai's verdict | A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form. | S-tier for open-source model APIs. The default in this space. | B-tier. Still early. Manus is more flexible for less money. | A-tier for sales teams. B-tier for solo users. |
| Link | Open → | Open → | Open → | Open → |