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Sentinel
Model gateway that routes every request to the cheapest capable model
Most requests do not need your most expensive model. Sentinel predicts, per tier, whether a cheaper model will answer well, routes accordingly, and keeps an auditable ledger of what each request cost. It speaks the OpenAI API, so it drops in front of existing code.
Capabilities
What Sentinel does
Calibrated per-tier prediction of whether a cheaper model suffices
Per-request cost accounting with an auditable ledger
W3C trace context propagation for end-to-end tracing
Circuit breakers and load-tested failure behaviour
OpenAI-compatible, so integration is a base-URL change
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