Why AI labs need middle‑tier biorisk alerts before crossing red lines
The analysis of Anthropic's Claude Mythos/Fable 5 card shows that the jump from CB‑1 (non‑novel) to CB‑2 (novel) bioweapon thresholds leaves a risky gray zone. It proposes intermediate warning levels that focus on bottleneck reduction, letting labs trigger safeguards before a red‑line is technically crossed.