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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
Galileo AI
B
ChatGPT Operator
B
Replicate
S
TaglineCognition Labs' autonomous coding engineer.Prompt to UI design. Figma-ready outputs.OpenAI's browser agent. Clicks and types on websites for you.Run any open-source AI model with an API call.
CategoryAgentsDesignAgentsDev Platform
Pricing$500/moFree trial + paid plansIncluded with ChatGPT Pro $200/moPay per second of compute
Best forEngineering teams offloading tickets. Ops/platform work.Designers brainstorming first drafts.Power users willing to pay $200/mo for a browser bot.Developers using open-source models (Flux, SDXL, Whisper, etc).
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Prompt-to-UI with real layouts
  • Exports to Figma
  • Faster than hand-designing from scratch
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Output needs designer polish
  • Pricing unclear / changes often
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Cold starts on less-popular models
  • Pricing gets real at scale
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.B-tier. Useful for first drafts. v0 is the better bet for shipping code.B-tier. Still early. Manus is more flexible for less money.S-tier for open-source model APIs. The default in this space.
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