Auto Exacto

OpenRouter's Auto Exacto changes which provider serves a model request when some providers handle it poorly. It checks generation speed, whether tool calls have valid structure and names, and recurring benchmark results. Providers that perform unusually poorly for that model move behind their peers; ordering preferences remain in effect within each quality tier. The announcement says these assessments refresh roughly every five minutes.

This extends the original Exacto approach, which relied on hand-curated provider lists. The new routing is enabled by default for tool requests where enough providers exist to measure differences, and the announcement notes that quality-weighted routing may favor providers that cost somewhat more than the cheapest option.