Anthropic's Fable 5.1 tops benchmarks, but cost gap with China widens

Anthropic's new Claude Fable 5.1 model has achieved top scores on leading AI benchmarks, surpassing both its predecessors and Chinese rivals. The model claimed first place on Vals AI's index for complex real-world tasks in finance, coding, and law, with Anthropic's earlier Opus 5 and Fable 5 models following in second and third. This performance has sparked debate about whether US labs are pulling ahead of Chinese competitors. Yuchen Jin, a technical staff member at Databricks, called the capability leap 'insane', while observers noted it challenges claims that Chinese open-weight developers had closed the gap. However, a stark price difference highlights a growing divide: Fable 5.1's operating costs are significantly higher than budget-friendly open-weight models from China, which continue to gain commercial traction globally. This cost disparity underscores differing strategic approaches between the US and China in AI development.