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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
Cursor
S
Grok
A
Replicate
S
TaglineCognition Labs' autonomous coding engineer.VS Code fork that made AI coding actually work.xAI's chatbot. Real-time X/Twitter data + fewer refusals.Run any open-source AI model with an API call.
CategoryAgentsCodingChatbotsDev Platform
Pricing$500/moFree + $20/mo Pro + $40/mo BusinessFree + $30/mo SuperGrok + included with X PremiumPay per second of compute
Best forEngineering teams offloading tickets. Ops/platform work.Developers. Non-developers who want to ship working code.Breaking news, live event tracking, users already on X.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
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Live access to X posts for real-time events
  • Less restrictive on edgy questions
  • Fast inference on Grok-3 and up
  • 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
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Writing quality trails Claude/ChatGPT
  • Political bias debates
  • Ecosystem is just X
  • 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.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier for real-time. B-tier for everything else. Worth checking when news breaks.S-tier for open-source model APIs. The default in this space.
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