Release archive

Claude Code v2.1.73: modelOverrides, Permission-Prompt Freezes, and a Bedrock Model Default Change

Claude Code v2.1.73 adds a modelOverrides setting for custom provider model IDs, fixes freezes and 100% CPU loops from permission prompts, stops subagents being silently downgraded on Bedrock, Vertex and Foundry, and changes the default Opus model there to Opus 4.6.

• 10 min read • By ClaudeWorld

Claude Code v2.1.73 has 26 changelog entries: 2 additions, 15 fixes, 6 improvements, 1 change, 1 deprecation, and 1 VS Code fix. If you run Claude Code on Bedrock, Vertex, or Microsoft Foundry, two of them change behaviour you should know about.

What’s New

  • modelOverrides maps model picker entries to custom provider model IDs, such as Bedrock inference profile ARNs.
  • SSL certificate failures now come with guidance. When OAuth login or a connectivity check fails behind a corporate proxy, the error points at NODE_EXTRA_CA_CERTS.

Changed Behaviour Worth Knowing

  • The default Opus model on Bedrock, Vertex, and Microsoft Foundry is now Opus 4.6, where it was Opus 4.1.
  • /output-style is deprecated — use /config. Output style is now fixed at session start, which allows better prompt caching.

Stability Fixes

  • Freezes and 100% CPU loops triggered by permission prompts for complex bash commands.
  • A deadlock when many skill files changed at once, such as during a git pull in a repository with a large .claude/skills/ directory.
  • Bash tool output being lost when several Claude Code sessions ran in the same project directory.
  • Background bash processes spawned by subagents not being cleaned up when the agent exited.
  • Voice mode session corruption when a slow connection overlapped a new recording.

Providers and Platforms

  • Subagents with model: opus, sonnet, or haiku were being silently downgraded to older model versions on Bedrock, Vertex, and Microsoft Foundry.
  • /loop was unavailable on Bedrock, Vertex, and Foundry, and when telemetry was disabled.
  • The Linux sandbox failed to start with “ripgrep (rg) not found” on native builds, and Linux native modules did not load on Amazon Linux 2 and other glibc 2.26 systems.
  • /heapdump on Windows failed with EEXIST when the Desktop folder already existed.
  • [VS Code] HTTP 400 errors for users behind proxies, or on Bedrock and Vertex with Claude 4.5 models.

Smaller Fixes and Improvements

/resume no longer shows the current session in the picker; /ide no longer crashes with onInstall is not defined while auto-installing the extension; SessionStart hooks no longer fire twice on --resume or --continue; JSON-output hooks no longer inject no-op system-reminder messages every turn; and a “media_type: Field required” API error on images received through Remote Control is fixed.

On the improvement side: Up arrow after interrupting Claude now restores the interrupted prompt and rewinds the conversation in one step; IDE detection is faster at startup; clipboard image pasting is faster on macOS; /effort works while Claude is responding, matching /model; voice mode retries transient connection failures during rapid push-to-talk re-press; and the Remote Control spawn mode prompt carries more context.

The full list is in the official changelog.

How to Update

  1. Check your installed version: claude --version
  2. Update in place: claude update