Introducing Baseten Router: a Pareto-optimal model router for coding tasks

Baseten Router routes each coding task between models such as Opus 5.5 and GLM 5.3 Flash based on predicted success rate and cost, and in benchmarks spanning DeepSWE 1.1, SWE Atlas QnA and Terminal-Bench 2.1 it came within 0.8 percentage points of Opus 5.5's pass rate at 72% lower cost. Baseten says it was the only commercial router it evaluated that beat random routing at the same cost by a statistically significant margin, with configurable Cost, Balanced and Intelligence thresholds. It is part of Baseten Grid, now in public preview.