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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
Gemini
A
Perplexity
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Replit's AI that builds + deploys full apps on their platform.Google's answer. Best integrated with Workspace + free for a lot.AI search done right. Cited answers, not chat theater.
Categorycodingcodingchatresearch
PricingFree (limited) + $10/mo Pro + $19/mo Business$10-$25/mo Core/TeamsFree + $20/mo Advanced (bundled with 2TB Drive)Free + $20/mo Pro
Best forTeams with GitHub already. Devs who don't want to change IDEs.Teachers, students, prototypers, hackathon builders.Anyone already on Google, research tasks, summarizing long documents.Replacing Google for any question where you want a cited answer in seconds.
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
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Locked into Replit hosting
  • Less code quality than dedicated IDEs
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Not a general chatbot
  • Answers can be shallow on complex topics
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.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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