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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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OpenRouter
S
Stable Audio
A
Sora
A
Perplexity
S
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Stability AI's open audio model. Loops + SFX + background.OpenAI's video model. Long clips, cinematic quality.AI search done right. Cited answers, not chat theater.
CategoryDev PlatformAudioVideoResearch
PricingPay per token — model-dependentFree + $12/mo Pro + enterpriseIncluded with ChatGPT Plus/ProFree + $20/mo Pro
Best forDevelopers experimenting across models. Apps that want fallback logic.Game developers, podcasters needing SFX, video creators needing background music.ChatGPT subscribers experimenting with cinematic shots.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Open-weight model available
  • Great for loops + game audio + SFX
  • Commercial-use clarity
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Not for full songs with vocals
  • Shorter generation limits
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.A-tier for its niche. Different use case than Suno — SFX and loops, not songs.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.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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