OpenRouter has introduced Advisor, a tool that lets a model call out to a stronger model when it needs help. The idea is to give cheaper or smaller models a fallback path instead of forcing every request through the most capable system by default.
That is interesting because model routing is becoming more granular. Rather than picking one model for an entire workflow, developers can design systems where models collaborate based on difficulty, cost, or confidence.
If it works well, this kind of escalation pattern could make mixed-model applications cheaper without giving up quality on hard cases.