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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Perplexity S | Replicate S | Gamma A | Aider A | |
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| Tagline | AI search done right. Cited answers, not chat theater. | Run any open-source AI model with an API call. | AI slide decks that don't look AI-generated. | Terminal-based AI pair programmer. Git-aware, model-flexible. |
| Category | Research | Dev Platform | Productivity | Coding |
| Pricing | Free + $20/mo Pro | Pay per second of compute | Free + $10-$20/mo | Free (open source) + whatever API you use |
| Best for | Replacing Google for any question where you want a cited answer in seconds. | Developers using open-source models (Flux, SDXL, Whisper, etc). | Pitch decks, proposals, internal presentations — fast. | Developers who want open-source tooling with full control. |
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| Kai's verdict | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. | S-tier for open-source model APIs. The default in this space. | A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes. | A-tier. The right answer if you want open-source + terminal-native + model-agnostic. |
| Link | Open → | Open → | Open → | Open → |