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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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Dev Platform
Audio
Research
Agents
Coding
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Image
Video
Voice
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Perplexity
S
Kling
A
Lex
A
Suno
S
TaglineAI search done right. Cited answers, not chat theater.Kuaishou's video model. The surprise standout.Google Docs with an AI collaborator baked in.Prompt to full song with vocals, instruments, the works.
CategoryResearchVideoWritingAudio
PricingFree + $20/mo ProCredit-based, free trialFree + $12/moFree + $10/mo + $30/mo
Best forReplacing Google for any question where you want a cited answer in seconds.Anyone who wants top-tier video quality for less.Essays, long-form drafts, thinking on the page.Jingles, intros, demos, sketches, personal use.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • UX is rough for English speakers
  • Queue times
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Copyright gray zone
  • Audio quality behind studio
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier in its category. The first AI music tool I'd actually listen to.
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