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anthropics/claude-code v2.1.174

feature_update 291 words

TL;DR

  • UI and Model Selection: Claude Code v2.1.174 fixes critical display issues in the model picker, ensuring users see accurate default model assignments across different plan tiers
  • Infrastructure Stability: Resolution of Bedrock GovCloud routing errors and environment variable inheritance bugs eliminates deployment blockers for enterprise users
  • User Experience: New scroll acceleration toggle and performance improvements enhance reliability in fullscreen mode and session management

What happened

Anthropic released Claude Code v2.1.174, a maintenance update addressing eight distinct technical issues affecting model selection, infrastructure routing, and user experience. Available on GitHub, this version focuses on fixing display inconsistencies and backend configuration problems that impacted both individual developers and enterprise deployments.

The update resolves a longstanding model picker bug where the default Claude model wasn't properly displayed. Previously, users on Max/Team Premium/Enterprise plans would see Sonnet listed instead of Opus, while the actual default behavior differed. The fix ensures transparency—Opus now correctly appears on premium tiers, Sonnet on Pro/Team plans, and Opus on pay-as-you-go accounts.

A critical fix addresses Bedrock GovCloud deployments, where regions designated us-gov-* were incorrectly deriving inference profile prefixes as "global" instead of "us-gov," resulting in 400 errors. This issue directly impacted government and compliance-sensitive deployments.

Additional improvements include preventing environment variable inheritance issues in background sessions, which previously caused custom gateway URLs and provider configurations to leak between sessions. A new wheelScrollAccelerationEnabled setting lets users disable mouse-wheel acceleration in fullscreen mode, while false billing notifications for Fable 5 on enterprise accounts were eliminated.

Learn more

  • Claude Code Repository: Explore the full release notes for implementation details
  • Anthropic Documentation: Review model defaults and plan-specific configurations in the official documentation
  • Bedrock Integration: Check AWS documentation for GovCloud region specifications if using government deployments This article does not contain affiliate links.