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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
ChatGPT Operator
B
Lex
A
Claude Code
S
TaglineCognition Labs' autonomous coding engineer.OpenAI's browser agent. Clicks and types on websites for you.Google Docs with an AI collaborator baked in.Anthropic's CLI agent. Opus-powered, operates on your repo directly.
Categoryagentsagentswritingcoding
Pricing$500/moIncluded with ChatGPT Pro $200/moFree + $12/moPart of Claude Pro/Max/Team plans
Best forEngineering teams offloading tickets. Ops/platform work.Power users willing to pay $200/mo for a browser bot.Essays, long-form drafts, thinking on the page.Developers who want an agent, not autocomplete. Large refactors, tests, docs.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.B-tier. Still early. Manus is more flexible for less money.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.
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