CLAIM-2026-10-15-05

For Claude Fable 5 the security pass rate is 25.3% and the functional-and-secure rate is 25.1%, a difference of two tenths of a percentage point, so security rather than functionality is the binding constraint.

Why it matters

Tells an engineer where the budget goes: the constraint is security, not getting the code to work.

Sources

• lastsecurec2026last
• github2026alibabala