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How to Route LLM Requests: Building a Cost-Optimized Fallback Chain

This story is from 2026-10-20. It is preserved in the archive; the latest stories are on the live feed.

I got paged twice in the last two months because a single model dependency went down. One was a Copilot billing spike after a silent pricing change on a reasoning-heavy endpoint. The other was Anthropic’s Claude Fable 5 and Mythos 5, getting suspended on June 12, 2026, to comply with U.S. Departmen…

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  1. 2026-10-20 09:27 · DEV Community — AI
    How to Route LLM Requests: Building a Cost-Optimized Fallback Chain

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