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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
Runway
S
Claude Code
S
TaglineStability AI's open audio model. Loops + SFX + background.The pro's AI video tool. Gen-4 is the current bar.Anthropic's CLI agent. Opus-powered, operates on your repo directly.
Categoryaudiovideocoding
PricingFree + $12/mo Pro + enterpriseFree + $15-$95/moPart of Claude Pro/Max/Team plans
Best forGame developers, podcasters needing SFX, video creators needing background music.Marketing video, pitch decks, b-roll, creative shorts.Developers who want an agent, not autocomplete. Large refactors, tests, docs.
Strengths
  • Open-weight model available
  • Great for loops + game audio + SFX
  • Commercial-use clarity
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
Weaknesses
  • Not for full songs with vocals
  • Shorter generation limits
  • Expensive at scale
  • Still needs post-editing
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
Kai's verdictA-tier for its niche. Different use case than Suno — SFX and loops, not songs.S-tier. Market leader with reason. Start here for serious video.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.
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