Claude Code v2.1.219 introduces Claude Opus 5 as the new default Opus model, featuring a 1M context window and fast mode pricing of $10/$50 per Mtok. The update also enables nested subagent forwarding in stream-json and increases the maximum nesting depth to 3 by default.
Anthropic released Claude Code version 2.1.225, introducing new usage warnings for gateway spend limits and a workspace trust prompt for untrusted directories. The update also addresses several authentication issues, including transient 401 errors in headless sessions and intermittent failures on macOS keychain reads.
Anthropic has released Claude Code version 2.1.224, introducing significant new capabilities for deployment and session management alongside various bug fixes.
Claude Code v2.1.223 introduces new managed settings for GitHub organization-level marketplace control and addresses several security vulnerabilities related to permission checks.
Claude Code v2.1.222 addresses several critical issues regarding session security, connectivity stability, and billing accuracy. Key updates include enforcing worktree isolation for destructive git commands and fixing PreToolUse hooks that previously bypassed tool restrictions in background tasks.
Claude Code version 2.1.221 introduces a new Focus view that hides tool activity behind an expandable summary, adds mask mode for sandbox credential files on Linux and WSL, and resolves critical security issues in the Bash tool.
Claude Code v2.1.218 updates the `/code-review` command to run as a background subagent, preventing review work from filling the conversation and allowing stacked slash commands to use it as their target.
Claude Code version 2.1.217 introduces several bug fixes and configuration changes, including emoji shortcode autocomplete in the prompt input and warnings for failing transcript writes. The update addresses critical stability issues such as a memory leak involving truncated MCP tool outputs and Windows auto-update failures that could leave claude.exe missing.
Claude Code version 2.1.216 addresses a critical performance regression where message normalization cost grew quadratically with the number of turns, causing multi-second stalls in long sessions. The update also introduces a new `sandbox.filesystem.disabled` setting that allows users to skip filesystem isolation while retaining network egress control.
Claude Code version 2.1.215 updates the behavior of the /verify and /code-review skills so that they are no longer executed automatically.
Claude Code version 2.1.214 addresses critical security vulnerabilities, including a permission-check bypass in Windows PowerShell 5.1 and issues with Bash permission checks. The update also introduces the EndConversation tool, allowing Claude to terminate sessions with abusive users or those attempting jailbreaks.
Anthropic released Claude Code v2.1.212, introducing significant workflow improvements including a new /fork command for background sessions, auto-mode configuration resets, and safeguards against runaway tool usage.
Anthropic released Claude Code v2.1.211, addressing a wide range of bugs in session management, file handling, and agent reliability while introducing new configuration flags.
Claude Code v2.1.210 introduces several bug fixes and improvements, including hardened security against indirect prompt injection and updated permission classifiers for auto mode.
Claude Code version 2.1.209 addresses a regression where the /model command and other dialogs were blocked within claude agents background sessions.
Claude Code version 2.1.208 introduces an opt-in screen reader mode for plain-text rendering and addresses several critical issues with background agents and session stability.
Claude Code version 2.1.207 makes Auto mode available without opt-in on Bedrock, Vertex AI, and Foundry, while changing the default model for these platforms to Claude Opus 4.8.