Advisor Server Tool

OpenRouter's Advisor tool lets the model handling a task ask another model for guidance and then continue its own work. The consultation runs on the server and returns text as a tool result. Developers can choose models from different providers for the two roles.

This supports a workload design in which a cheaper model handles routine steps and consults a more expensive one selectively. The advisor gives a single-turn answer without running its own tool loop, and each model's usage is billed separately. The announcement establishes that mechanism; its illustrative pricing scenarios are not measured savings for a deployed workload.