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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GitHub Copilot B | Genspark A | Perplexity S | Claude Agent SDK S | |
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| Tagline | Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration. | AI agent for deep search. Generates Sparkpages — full mini-reports. | AI search done right. Cited answers, not chat theater. | Anthropic's SDK for building your own agents on Claude. |
| Category | Coding | Research | Research | Agents |
| Pricing | Free (limited) + $10/mo Pro + $19/mo Business | Free + $25/mo Plus | Free + $20/mo Pro | API usage + SDK is free |
| Best for | Teams with GitHub already. Devs who don't want to change IDEs. | Travel planning, shopping comparisons, deep research where you want an artifact back. | Replacing Google for any question where you want a cited answer in seconds. | Developers building custom agents for their own company/product. |
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| Kai's verdict | B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't. | A-tier. Bet on this one — the Sparkpage format is genuinely new. | 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. |
| Link | Open → | Open → | Open → | Open → |