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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)
Dev Platform
Agents
Voice
Video
Audio
Research
Coding
Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Replicate
S
Manus
S
Duolingo Max
A
Gamma
A
TaglineRun any open-source AI model with an API call.Autonomous AI agent that actually finishes tasks.Duolingo + AI. Explain My Answer + Roleplay features.AI slide decks that don't look AI-generated.
CategoryDev PlatformAgentsEducationProductivity
PricingPay per second of computeFree tier + $39-$199/mo$30/mo (or ~$168/yr)Free + $10-$20/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).People who want to hand off tasks entirely — trip planning, research, spreadsheet building.Language learners who've outgrown basic Duolingo.Pitch decks, proposals, internal presentations — fast.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
  • Locked into Gamma's format
  • Export quality varies
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier in the agent category. The first one I'd give to a non-technical friend.A-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
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