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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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GitHub Copilot
B
Grok
A
Devin
A
Manus
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.xAI's chatbot. Real-time X/Twitter data + fewer refusals.Cognition Labs' autonomous coding engineer.Autonomous AI agent that actually finishes tasks.
Categorycodingchatagentsagents
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $30/mo SuperGrok + included with X Premium$500/moFree tier + $39-$199/mo
Best forTeams with GitHub already. Devs who don't want to change IDEs.Breaking news, live event tracking, users already on X.Engineering teams offloading tickets. Ops/platform work.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Live access to X posts for real-time events
  • Less restrictive on edgy questions
  • Fast inference on Grok-3 and up
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Writing quality trails Claude/ChatGPT
  • Political bias debates
  • Ecosystem is just X
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for real-time. B-tier for everything else. Worth checking when news breaks.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier in the agent category. The first one I'd give to a non-technical friend.
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