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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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Cline
A
Devin
A
GitHub Copilot
B
Runway
S
TaglineOpen-source VS Code agent. Reads + writes + runs.Cognition Labs' autonomous coding engineer.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.The pro's AI video tool. Gen-4 is the current bar.
Categorycodingagentscodingvideo
PricingFree (open source) + your API costs$500/moFree (limited) + $10/mo Pro + $19/mo BusinessFree + $15-$95/mo
Best forVS Code users who want agentic coding without changing IDEs.Engineering teams offloading tickets. Ops/platform work.Teams with GitHub already. Devs who don't want to change IDEs.Marketing video, pitch decks, b-roll, creative shorts.
Strengths
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
Weaknesses
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Expensive at scale
  • Still needs post-editing
Kai's verdictA-tier. Best free agentic option in VS Code. Use with Claude for best results.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier. Market leader with reason. Start here for serious video.
LinkOpen →Open →Open →Open →