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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
Devin
A
Granola
S
Suno
S
TaglineRun any open-source AI model with an API call.Cognition Labs' autonomous coding engineer.Meeting notes that don't suck. Runs locally, no bot joins.Prompt to full song with vocals, instruments, the works.
CategoryDev PlatformAgentsMeetingsAudio
PricingPay per second of compute$500/moFree + $18/moFree + $10/mo + $30/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Engineering teams offloading tickets. Ops/platform work.Founders, execs, consultants who live in calls.Jingles, intros, demos, sketches, personal use.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • No bot in the call — runs on your Mac
  • Strong templates
  • Fast summaries
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Mac-only
  • Single-user by design
  • Copyright gray zone
  • Audio quality behind studio
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier. Category-defining UX. If you take notes in meetings, switch this week.S-tier in its category. The first AI music tool I'd actually listen to.
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