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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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Leonardo.ai
A
Suno
S
Stable Audio
A
Replicate
S
TaglineGamer + creator image gen with model fine-tuning built in.Prompt to full song with vocals, instruments, the works.Stability AI's open audio model. Loops + SFX + background.Run any open-source AI model with an API call.
CategoryImageAudioAudioDev Platform
PricingFree + $12-$60/moFree + $10/mo + $30/moFree + $12/mo Pro + enterprisePay per second of compute
Best forIndie game devs, illustrators, anyone training custom style models.Jingles, intros, demos, sketches, personal use.Game developers, podcasters needing SFX, video creators needing background music.Developers using open-source models (Flux, SDXL, Whisper, etc).
Strengths
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • Open-weight model available
  • Great for loops + game audio + SFX
  • Commercial-use clarity
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
Weaknesses
  • General output behind Midjourney
  • Can be overwhelming
  • Copyright gray zone
  • Audio quality behind studio
  • Not for full songs with vocals
  • Shorter generation limits
  • Cold starts on less-popular models
  • Pricing gets real at scale
Kai's verdictA-tier for creators training custom looks. B-tier for general use.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 for open-source model APIs. The default in this space.
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