Claude Code v2.1.166 update introduces `fallbackModel` setting for improved reliability.

Core summary

One sentence to understand this update

Claude Code version 2.1.166 now includes a `fallbackModel` setting that allows users to configure up to three alternative models for use when the primary model is unavailable or overloaded.

Impact & opportunity

What this could mean

Developers can enhance the resilience and availability of their AI applications by implementing robust fallback mechanisms for Claude models.