Routing semantics fix observed live: a task rule ("code → cheap model") was
pinning even high-complexity prompts to the cheap model — the tier system
never got a say. At tier=high the tier chain now leads and the task rule
demotes to fallback; low/medium keep task-rule-first. Unit-tested both ways.
The benchmark's hard probes are now GENERATED per run from two pools
(science: protein folding / telescope scheduling / materials discovery;
ops: epidemic logistics / grid markets / climate risk) with rotating domains
and numbers. Two findings against the live router drove this: ambiguity
carries the biggest weight in the complexity score, so interdisciplinary
prompts rate high reliably (0.52-0.66) while single-domain "hard" prompts
classify too confidently and sink to medium; and any fixed wording loses
novelty on every repeat. Their labels are null — straddling task labels is
precisely what makes them high, so classification is not judged.
Verified end-to-end: full run 100% answers, 13/13 classification, both hard
probes high → routed to the expensive model (one of them over a code task
rule), at $0.0018 each thanks to the tiny route-judge token budget.
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