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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
v0
S
Replit Agent
A
Gemini
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Vercel's AI-powered UI generator. Prompt to shadcn component.Replit's AI that builds + deploys full apps on their platform.Google's answer. Best integrated with Workspace + free for a lot.
Categorycodingdesigncodingchat
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20/mo$10-$25/mo Core/TeamsFree + $20/mo Advanced (bundled with 2TB Drive)
Best forTeams with GitHub already. Devs who don't want to change IDEs.Frontend devs, PMs prototyping UIs, anyone on Next.js.Teachers, students, prototypers, hackathon builders.Anyone already on Google, research tasks, summarizing long documents.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
  • Full-stack + DB + auth + deploy in one environment
  • Great for teaching/learning
  • Runs everything in-browser
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Best for shadcn stack
  • Iterating can be fiddly
  • Locked into Replit hosting
  • Less code quality than dedicated IDEs
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier. If you're on Vercel/shadcn, this is cheating.A-tier. Best for teaching a kid to code in 2026.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.
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