KaiAI tutor for anyone

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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 Code
S
Gemini
A
Groq
S
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Google's answer. Best integrated with Workspace + free for a lot.The fastest AI inference in the world. Crazy low latency.
CategoryDev PlatformCodingChatbotsDev Platform
PricingPay per token — model-dependentPart of Claude Pro/Max/Team plansFree + $20/mo Advanced (bundled with 2TB Drive)Free tier + pay-as-you-go API
Best forDevelopers experimenting across models. Apps that want fallback logic.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Anyone already on Google, research tasks, summarizing long documents.Developers who need sub-100ms LLM responses.
Strengths
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.S-tier for speed. When latency is the product, start here.
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