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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
Research
Coding
Image
Video
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Meetings
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Productivity
Audio
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Agents
Dev Platform
Data
Marketing
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Reflect
A
OpenRouter
S
DALL-E 3
B
Perplexity
S
TaglineAI-powered networked notes. Roam with a brain.One API, every model. Pay-as-you-go, no subscriptions.OpenAI's image model. Built into ChatGPT Plus.AI search done right. Cited answers, not chat theater.
CategoryProductivityDev PlatformImageResearch
Pricing$10/moPay per token — model-dependentIncluded with ChatGPT Plus $20/moFree + $20/mo Pro
Best forKnowledge workers + thinkers who want AI in their second brain.Developers experimenting across models. Apps that want fallback logic.ChatGPT Plus users who want images without paying extra.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • AI auto-links related notes
  • Generates backlinks + summaries
  • Clean, minimal UX
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Expensive for just notes
  • Smaller community than Obsidian
  • Slight markup over direct API
  • Some provider features not exposed
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-tier. Niche but beloved. If you've outgrown Notion, try this.S-tier for model-shopping. I use this for every prototype before committing.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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