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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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Claude Agent SDK
S
GitHub Copilot
B
ChatGPT Operator
B
TaglineAnthropic's SDK for building your own agents on Claude.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.OpenAI's browser agent. Clicks and types on websites for you.
Categoryagentscodingagents
PricingAPI usage + SDK is freeFree (limited) + $10/mo Pro + $19/mo BusinessIncluded with ChatGPT Pro $200/mo
Best forDevelopers building custom agents for their own company/product.Teams with GitHub already. Devs who don't want to change IDEs.Power users willing to pay $200/mo for a browser bot.
Strengths
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
Weaknesses
  • Developer-only
  • You build the UI
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
Kai's verdictS-tier for builders. The right primitives. What Kai is built on under the hood.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.B-tier. Still early. Manus is more flexible for less money.
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