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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
Replicate
S
GitHub Copilot
B
Devin
A
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Run any open-source AI model with an API call.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Cognition Labs' autonomous coding engineer.
Categorydev platformdev platformcodingagents
PricingPay per token — model-dependentPay per second of computeFree (limited) + $10/mo Pro + $19/mo Business$500/mo
Best forDevelopers experimenting across models. Apps that want fallback logic.Developers using open-source models (Flux, SDXL, Whisper, etc).Teams with GitHub already. Devs who don't want to change IDEs.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.S-tier for open-source model APIs. The default in this space.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
LinkOpen →Open →Open →Open →