Model gateways

OpenRouter

One API for every frontier model.

Overview

OpenRouter is the model gateway XeroHack uses by default. One key, every model, fallback routing, usage tracking. Day 0 of any project should be 'sign up for OpenRouter.'

Best for

Model-agnostic apps
Cost optimization
Fallback routing

Trade-offs

vs direct-apis

OpenRouter for portability; direct APIs for the last 5% of latency.

What XeroHack pre-wires

When you pick OpenRouter in the interview, the engine emits these files into your scaffold:

lib/ai/openrouter.ts

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