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Compare AI tools

Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
Pick tools (4 selected)
Chatbots
Research
Coding
Image
Video
Voice
Meetings
Design
Productivity
Audio
Writing
Agents
Dev Platform
Data
Marketing
Education
Lex
A
ChatGPT Operator
B
Hume AI
A
Replicate
S
TaglineGoogle Docs with an AI collaborator baked in.OpenAI's browser agent. Clicks and types on websites for you.Voice AI that reads + expresses emotion.Run any open-source AI model with an API call.
CategoryWritingAgentsVoiceDev Platform
PricingFree + $12/moIncluded with ChatGPT Pro $200/moFree tier + pay-as-you-goPay per second of compute
Best forEssays, long-form drafts, thinking on the page.Power users willing to pay $200/mo for a browser bot.Therapy apps, customer service, any voice agent where emotion matters.Developers using open-source models (Flux, SDXL, Whisper, etc).
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Niche use case
  • Pricing ramps fast
  • Cold starts on less-popular models
  • Pricing gets real at scale
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.B-tier. Still early. Manus is more flexible for less money.A-tier in its niche. The only one that actually gets emotion right.S-tier for open-source model APIs. The default in this space.
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