Claude Code v2.1.166 Adds Fallback Model Setting for Enhanced Resilience

Core summary

One sentence to understand this update

Claude Code released v2.1.166, introducing a fallbackModel setting that allows configuring up to three alternate models for use when the primary model is overloaded or unavailable.

Impact & opportunity

What this could mean

Builders can now configure fallback models to enhance the resilience and availability of their Claude Code applications, preventing service interruptions due to primary model overload or unavailability.