One Model vs Mixture-of-Models

Decision

Use this guide when choosing one model vs mixture-of-models. Neither option is universally superior; choose per workload and keep an escape path.

Choose One Model

One model minimizes orchestration, latency, cost surfaces, and failure modes.

Choose Mixture-of-Models

Reviewed multi-stage composition can separate specialist and evaluator roles when measured benefit justifies it.

Material tradeoffs

• Automatic Mixture-of-Models requires a deployment-approved execution contract.
• Bound total attempts, cost, latency, stage authority, and composed-result evaluation.

Validate the choice

• Test both paths on the same representative set.
• Compare quality, latency, cost, security, and operability.
• Document the decision, evidence window, review date, and rollback.