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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Dev Platform
Agents
Video
Coding
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Productivity
Writing
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Groq S | Perplexity S | Claude Agent SDK S | NotebookLM S | |
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| Tagline | The fastest AI inference in the world. Crazy low latency. | AI search done right. Cited answers, not chat theater. | Anthropic's SDK for building your own agents on Claude. | Google's research notebook. Turns your docs into a podcast. |
| Category | Dev Platform | Research | Agents | Research |
| Pricing | Free tier + pay-as-you-go API | Free + $20/mo Pro | API usage + SDK is free | Free |
| Best for | Developers who need sub-100ms LLM responses. | Replacing Google for any question where you want a cited answer in seconds. | Developers building custom agents for their own company/product. | Students, researchers, anyone with a stack of PDFs or a topic to learn. |
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| Kai's verdict | S-tier for speed. When latency is the product, start here. | S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week. | S-tier for builders. The right primitives. What Kai is built on under the hood. | S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs. |
| Link | Open → | Open → | Open → | Open → |