Parity Layer

Parity Layer is a drop-in AI gateway that tests cheaper models against your current one on your own traffic, produces a statistical quality proof, and routes to the cheaper model only after you activate the switch.

It replaces the OpenAI, Anthropic and Google SDK base URL in a two-line change. During the proof phase you keep paying your existing provider directly and Parity Layer adds no fee. Once a prompt is proven and activated, it bills per token at an integrated price below the baseline, with automatic fallback if quality drifts.

An offline proof option works from an uploaded request log instead of live traffic. The vendor states the service is not intended for coding agents.