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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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Gamma
A
Aider
A
TaglineRun any open-source AI model with an API call.AI slide decks that don't look AI-generated.Terminal-based AI pair programmer. Git-aware, model-flexible.
Categorydev platformproductivitycoding
PricingPay per second of computeFree + $10-$20/moFree (open source) + whatever API you use
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Pitch decks, proposals, internal presentations — fast.Developers who want open-source tooling with full control.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • 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
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Locked into Gamma's format
  • Export quality varies
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
Kai's verdictS-tier for open-source model APIs. The default in this space.A-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.
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