BYOK and enterprise custom models in the Copilot usage API

Automated excerpt

The Copilot usage metrics API now shows bring your own key (BYOK) usage across GitHub Copilot, so you can separate it from Copilot-hosted model usage. BYOK usage used to blend into Copilot-hosted totals, because local and custom models often share names with Copilot models. Local BYOK usage isn’t broken out by model name.

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