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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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Devin
A
Aider
A
Suno
S
Luma Dream Machine
A
TaglineCognition Labs' autonomous coding engineer.Terminal-based AI pair programmer. Git-aware, model-flexible.Prompt to full song with vocals, instruments, the works.Smooth, cinematic motion. Image-to-video specialist.
CategoryAgentsCodingAudioVideo
Pricing$500/moFree (open source) + whatever API you useFree + $10/mo + $30/moFree + $10-$500/mo
Best forEngineering teams offloading tickets. Ops/platform work.Developers who want open-source tooling with full control.Jingles, intros, demos, sketches, personal use.Photographers animating stills, cinematic b-roll.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • Best image-to-video in the category
  • Great camera motion control
  • Ray 2 model produces striking shots
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Copyright gray zone
  • Audio quality behind studio
  • Prompt fidelity below Runway
  • Queue times on free tier
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.S-tier in its category. The first AI music tool I'd actually listen to.A-tier. Best for cinematic image-to-video. Pair with Runway for coverage.
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