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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
Cursor
S
Framer
A
Sudowrite
S
TaglineRun any open-source AI model with an API call.VS Code fork that made AI coding actually work.Design + publish sites with AI assists built in.AI writing tool built specifically for fiction writers.
CategoryDev PlatformCodingDesignWriting
PricingPay per second of computeFree + $20/mo Pro + $40/mo BusinessFree + $5-$30/mo$19-$59/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers. Non-developers who want to ship working code.Designers shipping marketing sites without engineers.Novelists, screenwriters, fiction short-form writers.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • AI generates sections + copy + layouts
  • Designer-first publishing (not just templates)
  • Great animations
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Less flexible than raw code
  • Pricing per-site adds up
  • Pricey for casual use
  • Fiction-only focus — not for business writing
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier for designer-led sites. S-tier if animations matter.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.
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