A leaderboard cannot choose the right model for a workflow because the business decision includes more than raw capability. The route must account for task shape, error cost, data boundary, latency, review burden and accepted-output cost.
The Model Route Card
- Task class: extraction, drafting, reasoning, coding, classification or action.
- Risk class: low, review-required, approval-required or prohibited.
- Context class: public, internal, confidential or restricted.
- Output contract: prose, structured data, code, decision memo or tool action.
- Quality test: the acceptance criteria and evaluation set.
- Cost limit: budget per accepted result, not per call.
- Fallback: what happens when quality, availability or cost fails.
Build routes from evidence
- Group recurring tasks into stable classes.
- Create a small evaluation set for each class.
- Test candidate models under the same inputs and review rules.
- Measure accepted-output quality, time and cost.
- Assign one default route and one fallback.
- Re-test when the task, model or source system changes.
Keep routing simple
Do not build a router that changes models for every tiny variation. A few understandable routes are easier to govern, debug and improve than a clever routing layer no operator can explain.
The operating rule
Route the work, not the brand. The model earns a task class through measured performance and a controlled failure pattern.
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