Claude Opus 5 is now default. New features and bug fixes enhance development experience!
Changes in Claude Code Release v2.1.219
Original: v2.1.219
Importance: 新モデルと主要機能の追加により、広範な影響を与えるため。
Summary
The latest release v2.1.219 of Claude Code adds Claude Opus 5 as the default model with 1M context and a fast mode. It also introduces host restrictions in sandbox environments, a new directory addition hook, and improvements to error messages, among many other features and bug fixes. This enhances safety and efficiency for developers.
Key Points
- Claude Opus 5 added as default model
- Host restriction feature for sandbox environments
- New hook for post-directory addition
- Numerous improvements to error messaging
- Subagents can now nest up to depth 3
View developer notes (APIs, breaking changes, migration)
This release adds Claude Opus 5 as the default model, priced at $10/$50 per Mtok. A new setting `sandbox.network.strictAllowlist` restricts commands from non-allowlisted hosts in sandbox environments. Additionally, a hook that fires after directory additions and `mcp_server_errors` in headless streams improve error messaging. Subagents can now nest up to a depth of 3 by default. Numerous bug fixes are also included, enhancing usability.
Source: https://github.com/anthropics/claude-code/releases/tag/v2.1.219
Outlet: Claude Code Releases
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