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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Grok A | Replicate S | Hex A | Perplexity S | |
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| Tagline | xAI's chatbot. Real-time X/Twitter data + fewer refusals. | Run any open-source AI model with an API call. | Modern data notebook with Magic AI assistant. | AI search done right. Cited answers, not chat theater. |
| Category | Chatbots | Dev Platform | Data | Research |
| Pricing | Free + $30/mo SuperGrok + included with X Premium | Pay per second of compute | Free + $28+/user/mo | Free + $20/mo Pro |
| Best for | Breaking news, live event tracking, users already on X. | Developers using open-source models (Flux, SDXL, Whisper, etc). | Data teams at startups + enterprises. | Replacing Google for any question where you want a cited answer in seconds. |
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| Kai's verdict | A-tier for real-time. B-tier for everything else. Worth checking when news breaks. | S-tier for open-source model APIs. The default in this space. | A-tier for data teams. S-tier if you already live in SQL + Python. | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. |
| Link | Open → | Open → | Open → | Open → |