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.Pick tools (3 selected)
coding
image
productivity
writing
marketing
Replit Agent A | Lex A | Replicate S | |
|---|---|---|---|
| Tagline | Replit's AI that builds + deploys full apps on their platform. | Google Docs with an AI collaborator baked in. | Run any open-source AI model with an API call. |
| Category | coding | writing | dev platform |
| Pricing | $10-$25/mo Core/Teams | Free + $12/mo | Pay per second of compute |
| Best for | Teachers, students, prototypers, hackathon builders. | Essays, long-form drafts, thinking on the page. | Developers using open-source models (Flux, SDXL, Whisper, etc). |
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| Kai's verdict | A-tier. Best for teaching a kid to code in 2026. | 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. |
| Link | Open → | Open → | Open → |