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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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Suno
S
Kling
A
OpenRouter
S
Perplexity
S
TaglinePrompt to full song with vocals, instruments, the works.Kuaishou's video model. The surprise standout.One API, every model. Pay-as-you-go, no subscriptions.AI search done right. Cited answers, not chat theater.
CategoryAudioVideoDev PlatformResearch
PricingFree + $10/mo + $30/moCredit-based, free trialPay per token — model-dependentFree + $20/mo Pro
Best forJingles, intros, demos, sketches, personal use.Anyone who wants top-tier video quality for less.Developers experimenting across models. Apps that want fallback logic.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Copyright gray zone
  • Audio quality behind studio
  • UX is rough for English speakers
  • Queue times
  • Slight markup over direct API
  • Some provider features not exposed
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictS-tier in its category. The first AI music tool I'd actually listen to.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.S-tier for model-shopping. I use this for every prototype before committing.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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