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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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GitHub Copilot
B
Suno
S
Stable Audio
A
Runway
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Prompt to full song with vocals, instruments, the works.Stability AI's open audio model. Loops + SFX + background.The pro's AI video tool. Gen-4 is the current bar.
Categorycodingaudioaudiovideo
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $10/mo + $30/moFree + $12/mo Pro + enterpriseFree + $15-$95/mo
Best forTeams with GitHub already. Devs who don't want to change IDEs.Jingles, intros, demos, sketches, personal use.Game developers, podcasters needing SFX, video creators needing background music.Marketing video, pitch decks, b-roll, creative shorts.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • 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
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Copyright gray zone
  • Audio quality behind studio
  • Not for full songs with vocals
  • Shorter generation limits
  • Expensive at scale
  • Still needs post-editing
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier in its category. The first AI music tool I'd actually listen to.A-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.
LinkOpen →Open →Open →Open →