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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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Chatbots
Research
Coding
Image
Video
Voice
Meetings
Design
Productivity
Audio
Writing
Agents
Dev Platform
Data
Marketing
Education
Replicate
S
Sudowrite
S
Fathom
S
Taskade
B
TaglineRun any open-source AI model with an API call.AI writing tool built specifically for fiction writers.Meeting notes, free forever for individuals.AI project management with agents for each team.
CategoryDev PlatformWritingMeetingsProductivity
PricingPay per second of compute$19-$59/moFree for individuals + $15-$29/user/mo teamsFree + $8-$20/user/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Novelists, screenwriters, fiction short-form writers.Solo operators, freelancers, small teams on a budget.Small teams wanting AI baked into project management.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Custom AI agents per project
  • Doc + tasks + kanban in one
  • Affordable for teams
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Pricey for casual use
  • Fiction-only focus — not for business writing
  • Bot-joining model
  • Team features gated
  • Feature sprawl
  • AI agents need tuning to be useful
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.S-tier for solo + free. The best free option, hands down.B-tier. Solid product but crowded market. Try it if Notion AI feels too generic.
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