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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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OpenRouter
S
Claude
S
Gemini
A
Perplexity
S
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Anthropic's flagship — best reasoning + longest useful context.Google's answer. Best integrated with Workspace + free for a lot.AI search done right. Cited answers, not chat theater.
CategoryDev PlatformChatbotsChatbotsResearch
PricingPay per token — model-dependentFree + $20/mo Pro + team/enterpriseFree + $20/mo Advanced (bundled with 2TB Drive)Free + $20/mo Pro
Best forDevelopers experimenting across models. Apps that want fallback logic.Long writing, code, careful thinking, documents over 50 pages.Anyone already on Google, research tasks, summarizing long documents.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Image generation is weak
  • No native web search on all tiers
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.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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