Anthropic launched Sonnet 5, Claude Science, and restored Fable 5 globally on the same day a reverse-engineering discovery revealed Claude Code had been silently fingerprinting Chinese API proxy routing since April — 1,860 upvotes on HN. Mistral's Leanstral 1.5 and Lilian Weng's scaling-laws audit point toward formal verification emerging as the industry's next measurement layer. Google's cheapest-ever image model continues the race to zero-cost generation infrastructure.