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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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Stable Audio
A
HeyGen
S
Sora
A
TaglineStability AI's open audio model. Loops + SFX + background.AI avatar videos. Record once, speak any language.OpenAI's video model. Long clips, cinematic quality.
CategoryAudioVideoVideo
PricingFree + $12/mo Pro + enterpriseFree + $24-$65/moIncluded with ChatGPT Plus/Pro
Best forGame developers, podcasters needing SFX, video creators needing background music.Course creators, multilingual marketers, anyone scaling video content.ChatGPT subscribers experimenting with cinematic shots.
Strengths
  • Open-weight model available
  • Great for loops + game audio + SFX
  • Commercial-use clarity
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
Weaknesses
  • Not for full songs with vocals
  • Shorter generation limits
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
Kai's verdictA-tier for its niche. Different use case than Suno — SFX and loops, not songs.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
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