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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
Runway
S
Windsurf
A
Sudowrite
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.The pro's AI video tool. Gen-4 is the current bar.Codeium's agentic IDE. Cascade agent + strong free tier.AI writing tool built specifically for fiction writers.
Categorycodingvideocodingwriting
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $15-$95/moFree + $15/mo Pro$19-$59/mo
Best forTeams with GitHub already. Devs who don't want to change IDEs.Marketing video, pitch decks, b-roll, creative shorts.Developers who want Cursor-like power for less money.Novelists, screenwriters, fiction short-form writers.
Strengths
  • 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
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Expensive at scale
  • Still needs post-editing
  • Smaller community
  • Model selection more limited
  • Pricey for casual use
  • Fiction-only focus — not for business writing
Kai's verdictB-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.A-tier. Close second to Cursor. If $5/mo matters, start here.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.
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