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Elon Musk announced that Grok Bot will use the best available model for each task, including Claude Opus 5.5 and other interfaces, in a shift reflecting the growing use of a multi-model routing approach to control costs. OpenRouter data shows that cheaper models handle most request volume, while more powerful models are reserved for tasks that actually require them.
The fifth installment of the Stack Overflow Blog series presents a practical framework for running large language model systems, focusing on observability, cost control, request routing between models, safe fallback, and an immediate kill switch. The central idea is to route every model operation through a single gateway that connects measurement, control, identity, and infrastructure.