Claude Fable 5.1 lands on Claude Code and Platform, cache reads 75% cheaper

Claude Fable 5.1 上线 Claude Code 与 Claude Platform，缓存读取降价 75%

Anthropic shipped Claude Fable 5.1 and Mythos 5.1 together. Pricing matches Fable 5, but API cache reads are 75% cheaper. The model stays autonomous longer on long tasks, flags when it's stuck more proactively, and writes more naturally. The post doesn't disclose latency, context window, or benchmark scores—I'd discount the 'most advanced' claim until numbers land.

Why it matters: Anthropic shipped Fable 5.1 and Mythos 5.1 together with a 75% cache-read price cut — a real cost improvement that heavy Claude Code users will care about. Missing latency, context window, and benchmark numbers keeps it from scoring higher, but the price drop and tooling updat...