Guide — Updated August 2026
How Foundry Model Router cuts cost by picking the best model per prompt — and how to configure it.
Model Router promises big savings by routing per prompt. This guide explains how it works and how to get the savings safely.
This guide explains Foundry Model Router (GA, version 2025-11-18, across 28 regions): it automatically selects the best chat model per prompt for up to ~60% inference-cost savings at GPT-5-family fidelity. The routing pool includes gpt-5.6-sol/terra/luna and claude-opus-4-8 (older *-chat models were removed). It covers routing profiles (quality vs cost), custom model subsets, automatic failover, and agentic routing across OpenAI, OSS, and Anthropic models.
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