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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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Devin
A
Cline
A
Claude Code
S
Lex
A
TaglineCognition Labs' autonomous coding engineer.Open-source VS Code agent. Reads + writes + runs.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Google Docs with an AI collaborator baked in.
CategoryAgentsCodingCodingWriting
Pricing$500/moFree (open source) + your API costsPart of Claude Pro/Max/Team plansFree + $12/mo
Best forEngineering teams offloading tickets. Ops/platform work.VS Code users who want agentic coding without changing IDEs.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Essays, long-form drafts, thinking on the page.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. Best free agentic option in VS Code. Use with Claude for best results.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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