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 | Suno S | Hume AI A | Grok A | |
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| Tagline | AI search done right. Cited answers, not chat theater. | Prompt to full song with vocals, instruments, the works. | Voice AI that reads + expresses emotion. | xAI's chatbot. Real-time X/Twitter data + fewer refusals. |
| Category | Research | Audio | Voice | Chatbots |
| Pricing | Free + $20/mo Pro | Free + $10/mo + $30/mo | Free tier + pay-as-you-go | Free + $30/mo SuperGrok + included with X Premium |
| Best for | Replacing Google for any question where you want a cited answer in seconds. | Jingles, intros, demos, sketches, personal use. | Therapy apps, customer service, any voice agent where emotion matters. | Breaking news, live event tracking, users already on X. |
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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 in its category. The first AI music tool I'd actually listen to. | A-tier in its niche. The only one that actually gets emotion right. | A-tier for real-time. B-tier for everything else. Worth checking when news breaks. |
| Link | Open → | Open → | Open → | Open → |