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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
ChatGPT
S
Fathom
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.AI search done right. Cited answers, not chat theater.The default. Strongest ecosystem + best multimodal breadth.Meeting notes, free forever for individuals.
Categorycodingresearchchatmeeting
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20/mo ProFree + $20/mo Plus + $200/mo ProFree for individuals + $15-$29/user/mo teams
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.General use, voice chat, image generation, first-time AI users.Solo operators, freelancers, small teams on a budget.
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
  • Great voice mode
  • Huge plugin/custom GPT ecosystem
  • Strong image generation (DALL-E built in)
  • Code Interpreter
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Reasoning quality varies by mode
  • Can be verbose
  • Confabulates on niche facts
  • Bot-joining model
  • Team features gated
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 all-rounder. If you want one tool that does everything okay-to-great, this is it.S-tier for solo + free. The best free option, hands down.
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