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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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Sudowrite
S
GitHub Copilot
B
Devin
A
Groq
S
TaglineAI writing tool built specifically for fiction writers.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Cognition Labs' autonomous coding engineer.The fastest AI inference in the world. Crazy low latency.
CategoryWritingCodingAgentsDev Platform
Pricing$19-$59/moFree (limited) + $10/mo Pro + $19/mo Business$500/moFree tier + pay-as-you-go API
Best forNovelists, screenwriters, fiction short-form writers.Teams with GitHub already. Devs who don't want to change IDEs.Engineering teams offloading tickets. Ops/platform work.Developers who need sub-100ms LLM responses.
Strengths
  • 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
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Pricey for casual use
  • Fiction-only focus — not for business writing
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
Kai's verdictS-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 for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for speed. When latency is the product, start here.
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