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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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S
Sora
A
Suno
S
Udio
A
TaglineRun any open-source AI model with an API call.OpenAI's video model. Long clips, cinematic quality.Prompt to full song with vocals, instruments, the works.Suno's main rival. Often better on instrumental nuance.
CategoryDev PlatformVideoAudioAudio
PricingPay per second of computeIncluded with ChatGPT Plus/ProFree + $10/mo + $30/moFree + $10-$30/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).ChatGPT subscribers experimenting with cinematic shots.Jingles, intros, demos, sketches, personal use.Musicians comparing AI outputs. Anyone who didn't click with Suno.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • Strong instrumentals + genre fidelity
  • Extend/remix features
  • Good lyric understanding
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Copyright gray zone
  • Audio quality behind studio
  • Same copyright gray zone as Suno
  • Ecosystem smaller
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.S-tier in its category. The first AI music tool I'd actually listen to.A-tier. Genuinely different vibe from Suno — worth trying both for a month.
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