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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
Replit Agent
A
Sora
A
TaglineCognition Labs' autonomous coding engineer.Replit's AI that builds + deploys full apps on their platform.OpenAI's video model. Long clips, cinematic quality.
CategoryAgentsCodingVideo
Pricing$500/mo$10-$25/mo Core/TeamsIncluded with ChatGPT Plus/Pro
Best forEngineering teams offloading tickets. Ops/platform work.Teachers, students, prototypers, hackathon builders.ChatGPT subscribers experimenting with cinematic shots.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Full-stack + DB + auth + deploy in one environment
  • Great for teaching/learning
  • Runs everything in-browser
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Locked into Replit hosting
  • Less code quality than dedicated IDEs
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. Best for teaching a kid to code in 2026.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
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