When should an agent escalate from a fast model to a stronger one?
Substantial-Heat-321 · reddit · 2026-07-21
The author asks how production agent systems decide when to escalate from a fast, cheap model to a stronger one instead of simply retrying.
They list the main signals people use:
- repeated retries without progress
- inconsistent tool outputs or schema failures
- a task expanding into multi-file or long-horizon reasoning
- context getting too large for the fast path
- the expected cost of another failure exceeding the cost of escalation
Their current view is that routing should follow observable execution signals rather than static prompt categories. They ask for the single most reliable signal used in production to trigger escalation.
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