Register Bias in Complexity-Based Large Language Model Routing

What changed

Complexity-based LLM routing systematically assigns non-standard English queries to lower-capacity models due to input length signals.

Why you should care

Complexity-based routing systematically assigns lower-capacity models to non-standard English registers.

Your move

Reconsider. Routing logic may unfairly downgrade non-standard English queries.

Evidence

Confirmedarxiv.org ↗

What to watch next

Industry adoption of register-aware routing metrics or updated evaluation benchmarks.

Event

research

Event date

Sep 17, 2026

Relevant to

General AI readers