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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Coding
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Elicit S | Cursor S | ChatGPT Operator B | Claude Agent SDK S | |
|---|---|---|---|---|
| Tagline | AI research assistant for academic literature. | VS Code fork that made AI coding actually work. | OpenAI's browser agent. Clicks and types on websites for you. | Anthropic's SDK for building your own agents on Claude. |
| Category | Research | Coding | Agents | Agents |
| Pricing | Free + $12-$42/mo | Free + $20/mo Pro + $40/mo Business | Included with ChatGPT Pro $200/mo | API usage + SDK is free |
| Best for | Grad students, researchers, anyone doing literature reviews. | Developers. Non-developers who want to ship working code. | Power users willing to pay $200/mo for a browser bot. | Developers building custom agents for their own company/product. |
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| Kai's verdict | S-tier for academic research. Nothing else comes close for systematic reviews. | S-tier for coding. If you write code of any kind, this pays back the $20 in a day. | B-tier. Still early. Manus is more flexible for less money. | S-tier for builders. The right primitives. What Kai is built on under the hood. |
| Link | Open → | Open → | Open → | Open → |