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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
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Image
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Meetings
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Audio
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Agents
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Data
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Replicate
S
Lex
A
Gamma
A
NotebookLM
S
TaglineRun any open-source AI model with an API call.Google Docs with an AI collaborator baked in.AI slide decks that don't look AI-generated.Google's research notebook. Turns your docs into a podcast.
CategoryDev PlatformWritingProductivityResearch
PricingPay per second of computeFree + $12/moFree + $10-$20/moFree
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Essays, long-form drafts, thinking on the page.Pitch decks, proposals, internal presentations — fast.Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Locked into Gamma's format
  • Export quality varies
  • Google-only
  • Can be slow on large corpora
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
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