Claude Code 2.1.73

Wednesday, 11 March 20262 new16 fixes8 other

AI summary

Written by AI from the official notes. Check them for exact details.

Claude Code 2.1.73 introduces new features for model mapping and improved error guidance, along with numerous bug fixes.

Added modelOverrides setting for custom provider model IDs
Improved guidance for OAuth login and SSL errors
Fixed CPU loops from permission prompts
Resolved session freezing with multiple skill file changes
Improved clipboard image pasting performance on macOS

Why it matters: Users of Claude Code should update to benefit from enhanced functionality and stability.

Official notes on github.com

Full release notes26 changes

What's changed

Added modelOverrides setting to map model picker entries to custom provider model IDs (e.g. Bedrock inference profile ARNs)
Added actionable guidance when OAuth login or connectivity checks fail due to SSL certificate errors (corporate proxies, NODE_EXTRA_CA_CERTS)
Fixed freezes and 100% CPU loops triggered by permission prompts for complex bash commands
Fixed a deadlock that could freeze Claude Code when many skill files changed at once (e.g. during git pull in a repo with a large .claude/skills/ directory)
Fixed Bash tool output being lost when running multiple Claude Code sessions in the same project directory
Fixed subagents with model: opus/sonnet/haiku being silently downgraded to older model versions on Bedrock, Vertex, and Microsoft Foundry
Fixed background bash processes spawned by subagents not being cleaned up when the agent exits
Fixed /resume showing the current session in the picker
Fixed /ide crashing with onInstall is not defined when auto-installing the extension
Fixed /loop not being available on Bedrock/Vertex/Foundry and when telemetry was disabled
Fixed SessionStart hooks firing twice when resuming a session via --resume or --continue
Fixed JSON-output hooks injecting no-op system-reminder messages into the model's context on every turn
Fixed voice mode session corruption when a slow connection overlaps a new recording
Fixed Linux sandbox failing to start with "ripgrep (rg) not found" on native builds
Fixed Linux native modules not loading on Amazon Linux 2 and other glibc 2.26 systems
Fixed "media_type: Field required" API error when receiving images via Remote Control
Fixed /heapdump failing on Windows with EEXIST error when the Desktop folder already exists
Improved Up arrow after interrupting Claude — now restores the interrupted prompt and rewinds the conversation in one step
Improved IDE detection speed at startup
Improved clipboard image pasting performance on macOS
Improved /effort to work while Claude is responding, matching /model behavior
Improved voice mode to automatically retry transient connection failures during rapid push-to-talk re-press
Improved the Remote Control spawn mode selection prompt with better context
Changed default Opus model on Bedrock, Vertex, and Microsoft Foundry to Opus 4.6 (was Opus 4.1)
Deprecated /output-style command — use /config instead. Output style is now fixed at session start for better prompt caching
VSCode: Fixed HTTP 400 errors for users behind proxies or on Bedrock/Vertex with Claude 4.5 models

Full release notes26 changes

What's changed

Added modelOverrides setting to map model picker entries to custom provider model IDs (e.g. Bedrock inference profile ARNs)
Added actionable guidance when OAuth login or connectivity checks fail due to SSL certificate errors (corporate proxies, NODE_EXTRA_CA_CERTS)
Fixed freezes and 100% CPU loops triggered by permission prompts for complex bash commands
Fixed a deadlock that could freeze Claude Code when many skill files changed at once (e.g. during git pull in a repo with a large .claude/skills/ directory)
Fixed Bash tool output being lost when running multiple Claude Code sessions in the same project directory
Fixed subagents with model: opus/sonnet/haiku being silently downgraded to older model versions on Bedrock, Vertex, and Microsoft Foundry
Fixed background bash processes spawned by subagents not being cleaned up when the agent exits
Fixed /resume showing the current session in the picker
Fixed /ide crashing with onInstall is not defined when auto-installing the extension
Fixed /loop not being available on Bedrock/Vertex/Foundry and when telemetry was disabled
Fixed SessionStart hooks firing twice when resuming a session via --resume or --continue
Fixed JSON-output hooks injecting no-op system-reminder messages into the model's context on every turn
Fixed voice mode session corruption when a slow connection overlaps a new recording
Fixed Linux sandbox failing to start with "ripgrep (rg) not found" on native builds
Fixed Linux native modules not loading on Amazon Linux 2 and other glibc 2.26 systems
Fixed "media_type: Field required" API error when receiving images via Remote Control
Fixed /heapdump failing on Windows with EEXIST error when the Desktop folder already exists
Improved Up arrow after interrupting Claude — now restores the interrupted prompt and rewinds the conversation in one step
Improved IDE detection speed at startup
Improved clipboard image pasting performance on macOS
Improved /effort to work while Claude is responding, matching /model behavior
Improved voice mode to automatically retry transient connection failures during rapid push-to-talk re-press
Improved the Remote Control spawn mode selection prompt with better context
Changed default Opus model on Bedrock, Vertex, and Microsoft Foundry to Opus 4.6 (was Opus 4.1)
Deprecated /output-style command — use /config instead. Output style is now fixed at session start for better prompt caching
VSCode: Fixed HTTP 400 errors for users behind proxies or on Bedrock/Vertex with Claude 4.5 models