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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
Claude Agent SDK
S
Groq
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.AI search done right. Cited answers, not chat theater.Anthropic's SDK for building your own agents on Claude.The fastest AI inference in the world. Crazy low latency.
Categorycodingresearchagentsdev platform
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20/mo ProAPI usage + SDK is freeFree tier + pay-as-you-go API
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 building custom agents for their own company/product.Developers who need sub-100ms LLM responses.
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
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Developer-only
  • You build the UI
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
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 builders. The right primitives. What Kai is built on under the hood.S-tier for speed. When latency is the product, start here.
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