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
Image
Productivity
Writing
Marketing
Cartesia S | Perplexity S | Ideogram S | DALL-E 3 B | |
|---|---|---|---|---|
| Tagline | Ultra-low-latency voice. Built for realtime agents. | AI search done right. Cited answers, not chat theater. | The one that actually gets text in images right. | OpenAI's image model. Built into ChatGPT Plus. |
| Category | Voice | Research | Image | Image |
| Pricing | Free tier + usage-based API | Free + $20/mo Pro | Free + $8/mo + $20/mo + $60/mo | Included with ChatGPT Plus $20/mo |
| Best for | Developers building voice agents, phone bots, interactive apps. | Replacing Google for any question where you want a cited answer in seconds. | Anything with text — posters, ads, album covers, slide decks. | ChatGPT Plus users who want images without paying extra. |
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| Kai's verdict | S-tier for realtime. If latency matters more than voice catalog, 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 text-in-image. Use this for posters, Midjourney for art. | B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately. |
| Link | Open → | Open → | Open → | Open → |