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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
Sudowrite
S
GitHub Copilot
B
Windsurf
A
TaglineOpen-source VS Code agent. Reads + writes + runs.AI writing tool built specifically for fiction writers.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Codeium's agentic IDE. Cascade agent + strong free tier.
CategoryCodingWritingCodingCoding
PricingFree (open source) + your API costs$19-$59/moFree (limited) + $10/mo Pro + $19/mo BusinessFree + $15/mo Pro
Best forVS Code users who want agentic coding without changing IDEs.Novelists, screenwriters, fiction short-form writers.Teams with GitHub already. Devs who don't want to change IDEs.Developers who want Cursor-like power for less money.
Strengths
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
Weaknesses
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Pricey for casual use
  • Fiction-only focus — not for business writing
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Smaller community
  • Model selection more limited
Kai's verdictA-tier. Best free agentic option in VS Code. Use with Claude for best results.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Close second to Cursor. If $5/mo matters, start here.
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