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 (4 selected)
coding
image
productivity
writing
marketing
Aider A | Lex A | Replicate S | Rows A | |
|---|---|---|---|---|
| Tagline | Terminal-based AI pair programmer. Git-aware, model-flexible. | Google Docs with an AI collaborator baked in. | Run any open-source AI model with an API call. | Spreadsheets with AI + live integrations baked in. |
| Category | coding | writing | dev platform | data |
| Pricing | Free (open source) + whatever API you use | Free + $12/mo | Pay per second of compute | Free + $19-$89/user/mo |
| Best for | Developers who want open-source tooling with full control. | Essays, long-form drafts, thinking on the page. | Developers using open-source models (Flux, SDXL, Whisper, etc). | Ops teams, marketers, anyone building dashboards from multiple sources. |
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| Kai's verdict | A-tier. The right answer if you want open-source + terminal-native + model-agnostic. | 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. | A-tier. The most interesting spreadsheet in years. Great for ops dashboards. |
| Link | Open → | Open → | Open → | Open → |