Release notes

Claude Code 2.1.174

· 2 new· 11 fixed

This release introduces detailed usage attribution in the Account & usage dialog, providing insights into cache misses, long context, and breakdowns per skill or agent. A new setting for disabling mouse-wheel scroll acceleration in fullscreen mode is also available for improved user comfort. Key fixes address the model picker's default family visibility, correct Bedrock GovCloud region inference, and prevent background sessions from inheriting incorrect provider environment variables. Additionally, performance improvements include a smoother exit experience on macOS/Linux and more efficient skill hot-reloads, ensuring a more reliable and transparent experience for all users.

Added2

  • Added `wheelScrollAccelerationEnabled` setting to disable mouse-wheel scroll acceleration in fullscreen mode
  • vscodeAdded usage attribution to the Account & usage dialog (`/usage`) showing cache misses, long context, subagents, and per-skill/agent/plugin/MCP breakdowns over the last 24h or 7d

Fixed11

  • Fixed the `/model` picker hiding the model family that Default resolves to — Opus now appears as its own row on Max/Team Premium/Enterprise plans, Sonnet on Pro/Team plans, and Opus on pay-as-you-go API accounts
  • Fixed `/model` picker showing a hardcoded Sonnet version label when `ANTHROPIC_DEFAULT_SONNET_MODEL` pins a different Sonnet
  • Fixed the "Fable 5 is now consuming usage credits" banner incorrectly showing for enterprise accounts with usage-based billing
  • Fixed Bedrock GovCloud regions (`us-gov-*`) deriving the wrong inference profile prefix (`global` instead of `us-gov`), causing 400 errors on derived model IDs
  • Fixed background sessions inheriting another session's `ANTHROPIC_*` provider env (gateway URL, custom headers, `/model` aliases) from the shell that started the background daemon
  • Fixed a 1-2 second pause when exiting Claude Code shortly after a shell command was interrupted or killed on macOS and Linux
  • Fixed git commit co-author attribution showing an incorrect model name for some models
  • Fixed the `/advisor` dialog pre-selecting a saved advisor model that is blocked by the `availableModels` allowlist
  • Fixed skill hot-reload re-sending the entire skill listing when a single skill changed; only changed skills are now re-announced
  • Fixed Workflow tool `agent()` subagents missing per-agent attribution headers
  • Fixed pre-warmed background workers failing with "Could not resolve authentication method" when claimed after sitting idle

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