LLM Router Optimization 2026: NotDiamond vs RouteLLM Tested
Compare NotDiamond vs RouteLLM with real benchmarks and learn LLM router optimization tactics that cut 2026 inference costs without downgrading model quality.
Chapter 1: The 2026 Inference Cost Crisis: Why Routing Beats Model Downgrades Here is the uncomfortable arithmetic most engineering teams discovered sometime in late 2025: their LLM bill grew faster than their user base. Not proportionally faster — structurally faster. Traffic doubled, spend quadrupled. The postmortems all landed on the same culprit, and it was never the price per token. Frontier model pricing has actually fallen. Adjusted for capability, a token in 2026 costs a fraction of what it did in 2023. But per-token pricing is the denominator, and the numerator has been growing on three independent axes simultaneously: context...