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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
Perplexity
S
Replicate
S
Windsurf
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.AI search done right. Cited answers, not chat theater.Run any open-source AI model with an API call.Codeium's agentic IDE. Cascade agent + strong free tier.
Categorycodingresearchdev platformcoding
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20/mo ProPay per second of computeFree + $15/mo Pro
Best forTeams with GitHub already. Devs who don't want to change IDEs.Replacing Google for any question where you want a cited answer in seconds.Developers using open-source models (Flux, SDXL, Whisper, etc).Developers who want Cursor-like power for less money.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Smaller community
  • Model selection more limited
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier for open-source model APIs. The default in this space.A-tier. Close second to Cursor. If $5/mo matters, start here.
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