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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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GitHub Copilot
B
Replit Agent
A
Replicate
S
Luma Dream Machine
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Replit's AI that builds + deploys full apps on their platform.Run any open-source AI model with an API call.Smooth, cinematic motion. Image-to-video specialist.
Categorycodingcodingdev platformvideo
PricingFree (limited) + $10/mo Pro + $19/mo Business$10-$25/mo Core/TeamsPay per second of computeFree + $10-$500/mo
Best forTeams with GitHub already. Devs who don't want to change IDEs.Teachers, students, prototypers, hackathon builders.Developers using open-source models (Flux, SDXL, Whisper, etc).Photographers animating stills, cinematic b-roll.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Full-stack + DB + auth + deploy in one environment
  • Great for teaching/learning
  • Runs everything in-browser
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Best image-to-video in the category
  • Great camera motion control
  • Ray 2 model produces striking shots
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Locked into Replit hosting
  • Less code quality than dedicated IDEs
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Prompt fidelity below Runway
  • Queue times on free tier
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Best for teaching a kid to code in 2026.S-tier for open-source model APIs. The default in this space.A-tier. Best for cinematic image-to-video. Pair with Runway for coverage.
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