Model routing should be optimized at the harness layer, not the gateway
agihouse_org · x · 2026-08-17
Jerry Liu argues that optimizing model routing at the harness layer, rather than the gateway layer, is crucial for hill-climbing on accuracy and cost for end-to-end tasks.
- Optimizing only at the gateway loses broader context encoded in the harness.
- Optimizing at the harness allows for "optimal" model choices a priori and within the agent loop.
- The model and harness are likely co-optimized, defining the Pareto frontier for specific tasks.
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