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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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Cline
A
Gemini
A
v0
S
Claude Code
S
TaglineOpen-source VS Code agent. Reads + writes + runs.Google's answer. Best integrated with Workspace + free for a lot.Vercel's AI-powered UI generator. Prompt to shadcn component.Anthropic's CLI agent. Opus-powered, operates on your repo directly.
CategoryCodingChatbotsDesignCoding
PricingFree (open source) + your API costsFree + $20/mo Advanced (bundled with 2TB Drive)Free + $20/moPart of Claude Pro/Max/Team plans
Best forVS Code users who want agentic coding without changing IDEs.Anyone already on Google, research tasks, summarizing long documents.Frontend devs, PMs prototyping UIs, anyone on Next.js.Developers who want an agent, not autocomplete. Large refactors, tests, docs.
Strengths
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
Weaknesses
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Best for shadcn stack
  • Iterating can be fiddly
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
Kai's verdictA-tier. Best free agentic option in VS Code. Use with Claude for best results.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.S-tier. If you're on Vercel/shadcn, this is cheating.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.
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