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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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S
Claude Code
S
OpenRouter
S
GitHub Copilot
B
TaglineRun any open-source AI model with an API call.Anthropic's CLI agent. Opus-powered, operates on your repo directly.One API, every model. Pay-as-you-go, no subscriptions.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.
Categorydev platformcodingdev platformcoding
PricingPay per second of computePart of Claude Pro/Max/Team plansPay per token — model-dependentFree (limited) + $10/mo Pro + $19/mo Business
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers who want an agent, not autocomplete. Large refactors, tests, docs.Developers experimenting across models. Apps that want fallback logic.Teams with GitHub already. Devs who don't want to change IDEs.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Slight markup over direct API
  • Some provider features not exposed
  • Less agentic than Cursor/Claude Code
  • Model quality varies
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier for model-shopping. I use this for every prototype before committing.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.
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