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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
OpenRouter
S
TaglinePrompt to full song with vocals, instruments, the works.One API, every model. Pay-as-you-go, no subscriptions.
CategoryAudioDev Platform
PricingFree + $10/mo + $30/moPay per token — model-dependent
Best forJingles, intros, demos, sketches, personal use.Developers experimenting across models. Apps that want fallback logic.
Strengths
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
Weaknesses
  • Copyright gray zone
  • Audio quality behind studio
  • Slight markup over direct API
  • Some provider features not exposed
Kai's verdictS-tier in its category. The first AI music tool I'd actually listen to.S-tier for model-shopping. I use this for every prototype before committing.
LinkOpen →Open →