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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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Replit Agent
A
Ideogram
S
Runway
S
Devin
A
TaglineReplit's AI that builds + deploys full apps on their platform.The one that actually gets text in images right.The pro's AI video tool. Gen-4 is the current bar.Cognition Labs' autonomous coding engineer.
CategoryCodingImageVideoAgents
Pricing$10-$25/mo Core/TeamsFree + $8/mo + $20/mo + $60/moFree + $15-$95/mo$500/mo
Best forTeachers, students, prototypers, hackathon builders.Anything with text — posters, ads, album covers, slide decks.Marketing video, pitch decks, b-roll, creative shorts.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Full-stack + DB + auth + deploy in one environment
  • Great for teaching/learning
  • Runs everything in-browser
  • Best text rendering in the game
  • Strong free tier
  • Good for logos, posters, thumbnails
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Locked into Replit hosting
  • Less code quality than dedicated IDEs
  • Aesthetic ceiling below Midjourney
  • Less style variety
  • Expensive at scale
  • Still needs post-editing
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictA-tier. Best for teaching a kid to code in 2026.S-tier for text-in-image. Use this for posters, Midjourney for art.S-tier. Market leader with reason. Start here for serious video.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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