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 | OpenAI Voice / Realtime S | GitHub Copilot B | Genspark A | |
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| Tagline | AI search done right. Cited answers, not chat theater. | ChatGPT's voice + the Realtime API for developers. | Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration. | AI agent for deep search. Generates Sparkpages — full mini-reports. |
| Category | Research | Voice | Coding | Research |
| Pricing | Free + $20/mo Pro | Voice included with ChatGPT Plus; Realtime API by usage | Free (limited) + $10/mo Pro + $19/mo Business | Free + $25/mo Plus |
| Best for | Replacing Google for any question where you want a cited answer in seconds. | Voice chat users, developers building voice agents on OpenAI. | Teams with GitHub already. Devs who don't want to change IDEs. | Travel planning, shopping comparisons, deep research where you want an artifact back. |
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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 conversation. A-tier for TTS. Complement to ElevenLabs, not replacement. | 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. |
| Link | Open → | Open → | Open → | Open → |