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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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Dev Platform
Agents
Voice
Video
Audio
Research
Coding
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Image
Meetings
Design
Productivity
Writing
Data
Marketing
Education
OpenRouter
S
Sudowrite
S
Rows
A
Luma Dream Machine
A
TaglineOne API, every model. Pay-as-you-go, no subscriptions.AI writing tool built specifically for fiction writers.Spreadsheets with AI + live integrations baked in.Smooth, cinematic motion. Image-to-video specialist.
CategoryDev PlatformWritingDataVideo
PricingPay per token — model-dependent$19-$59/moFree + $19-$89/user/moFree + $10-$500/mo
Best forDevelopers experimenting across models. Apps that want fallback logic.Novelists, screenwriters, fiction short-form writers.Ops teams, marketers, anyone building dashboards from multiple sources.Photographers animating stills, cinematic b-roll.
Strengths
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Best image-to-video in the category
  • Great camera motion control
  • Ray 2 model produces striking shots
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Pricey for casual use
  • Fiction-only focus — not for business writing
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Prompt fidelity below Runway
  • Queue times on free tier
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier. Best for cinematic image-to-video. Pair with Runway for coverage.
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