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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 Code
S
Claude Agent SDK
S
Gemini
A
TaglineAnthropic's CLI agent. Opus-powered, operates on your repo directly.Anthropic's SDK for building your own agents on Claude.Google's answer. Best integrated with Workspace + free for a lot.
Categorycodingagentschat
PricingPart of Claude Pro/Max/Team plansAPI usage + SDK is freeFree + $20/mo Advanced (bundled with 2TB Drive)
Best forDevelopers who want an agent, not autocomplete. Large refactors, tests, docs.Developers building custom agents for their own company/product.Anyone already on Google, research tasks, summarizing long documents.
Strengths
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
Weaknesses
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Developer-only
  • You build the UI
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
Kai's verdictS-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier for builders. The right primitives. What Kai is built on under the hood.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.
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