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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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Replicate
S
Suno
S
Lex
A
Granola
S
TaglineRun any open-source AI model with an API call.Prompt to full song with vocals, instruments, the works.Google Docs with an AI collaborator baked in.Meeting notes that don't suck. Runs locally, no bot joins.
CategoryDev PlatformAudioWritingMeetings
PricingPay per second of computeFree + $10/mo + $30/moFree + $12/moFree + $18/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Jingles, intros, demos, sketches, personal use.Essays, long-form drafts, thinking on the page.Founders, execs, consultants who live in calls.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • No bot in the call — runs on your Mac
  • Strong templates
  • Fast summaries
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Copyright gray zone
  • Audio quality behind studio
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Mac-only
  • Single-user by design
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier in its category. The first AI music tool I'd actually listen to.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier. Category-defining UX. If you take notes in meetings, switch this week.
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