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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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Aider
A
Devin
A
Luma Dream Machine
A
TaglineRun any open-source AI model with an API call.Terminal-based AI pair programmer. Git-aware, model-flexible.Cognition Labs' autonomous coding engineer.Smooth, cinematic motion. Image-to-video specialist.
CategoryDev PlatformCodingAgentsVideo
PricingPay per second of computeFree (open source) + whatever API you use$500/moFree + $10-$500/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers who want open-source tooling with full control.Engineering teams offloading tickets. Ops/platform work.Photographers animating stills, cinematic b-roll.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Best image-to-video in the category
  • Great camera motion control
  • Ray 2 model produces striking shots
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Prompt fidelity below Runway
  • Queue times on free tier
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. Best for cinematic image-to-video. Pair with Runway for coverage.
LinkOpen →Open →Open →Open →