Constellation of Models -- Sierra's Multi-Model Engineering Architecture

Sierra does not rely on a single LLM. Instead, agents are assembled from 15+ frontier, open-weight, and proprietary models orchestrated for different tasks -- low-latency operations, high-precision classification, long-context reasoning, and tone optimization. This module dives into Sierra's "constellation of models" architecture, the engineering philosophy behind it, built-in redundancy across model providers, and what it reveals about how Sierra engineers think about system design. This is essential knowledge for any technical interview at Sierra.