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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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TaglineTerminal-based AI pair programmer. Git-aware, model-flexible.Cognition Labs' autonomous coding engineer.OpenAI's video model. Long clips, cinematic quality.
CategoryCodingAgentsVideo
PricingFree (open source) + whatever API you use$500/moIncluded with ChatGPT Plus/Pro
Best forDevelopers who want open-source tooling with full control.Engineering teams offloading tickets. Ops/platform work.ChatGPT subscribers experimenting with cinematic shots.
Strengths
  • 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
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
Weaknesses
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
Kai's verdictA-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. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
LinkOpen →Open →Open →