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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
Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Gamma
A
Aider
A
ChatGPT
S
NotebookLM
S
TaglineAI slide decks that don't look AI-generated.Terminal-based AI pair programmer. Git-aware, model-flexible.The default. Strongest ecosystem + best multimodal breadth.Google's research notebook. Turns your docs into a podcast.
CategoryProductivityCodingChatbotsResearch
PricingFree + $10-$20/moFree (open source) + whatever API you useFree + $20/mo Plus + $200/mo ProFree
Best forPitch decks, proposals, internal presentations — fast.Developers who want open-source tooling with full control.General use, voice chat, image generation, first-time AI users.Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Great voice mode
  • Huge plugin/custom GPT ecosystem
  • Strong image generation (DALL-E built in)
  • Code Interpreter
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
Weaknesses
  • Locked into Gamma's format
  • Export quality varies
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Reasoning quality varies by mode
  • Can be verbose
  • Confabulates on niche facts
  • Google-only
  • Can be slow on large corpora
Kai's verdictA-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.S-tier all-rounder. If you want one tool that does everything okay-to-great, this is it.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
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