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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.
Pick tools (3 selected)
Dev Platform
Agents
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Audio
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Data
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Writesonic
B
Runway
S
Stable Audio
A
TaglineSEO-first AI writer. Optimized for ranking content.The pro's AI video tool. Gen-4 is the current bar.Stability AI's open audio model. Loops + SFX + background.
CategoryMarketingVideoAudio
PricingFree + $15-$99/moFree + $15-$95/moFree + $12/mo Pro + enterprise
Best forContent marketers churning out SEO articles.Marketing video, pitch decks, b-roll, creative shorts.Game developers, podcasters needing SFX, video creators needing background music.
Strengths
  • SEO built-in (Surfer integration)
  • Article generator for long-form
  • Chatsonic for research
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
  • Open-weight model available
  • Great for loops + game audio + SFX
  • Commercial-use clarity
Weaknesses
  • Output quality behind Claude for polish
  • SEO automation can produce generic content
  • Expensive at scale
  • Still needs post-editing
  • Not for full songs with vocals
  • Shorter generation limits
Kai's verdictB-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic.S-tier. Market leader with reason. Start here for serious video.A-tier for its niche. Different use case than Suno — SFX and loops, not songs.
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