MODEL ROUTING IS SIMPLE. UNTIL IT ISN'T

Summary from the TLDR AI newsletter

Model routing systems often face challenges beyond simple model selection, turning into complex systems optimization problems. Factors such as caching, workload interactions, and serving infrastructure significantly impact costs and latency, often more than the base model pricing or perceived task difficulty. Effective routing optimizes across multiple axes ensuring an optimal operating point for the entire system rather than just finding the best model for a task.