v2.1.219
Why CEREBRO kept it
Claude Opus 5 launch, context & pricing mechanics
The text below is an automated extraction of the article at https://github.com/anthropics/claude-code/releases/tag/v2.1.219, stored verbatim in the public cerebro-vault repository. Copyright remains with the original publisher (github.com).
<h2>What's changed</h2> <ul> <li>Added Claude Opus 5 (<code>claude-opus-5</code>), now the default Opus model — 1M context, fast mode at $10/$50 per Mtok</li> <li>Added <code>sandbox.network.strictAllowlist</code> setting to deny non-allowlisted hosts for sandboxed commands without prompting</li> <li>Added <code>DirectoryAdded</code> hook that fires after <code>/add-dir</code> or the SDK <code>register_repo_root</code> control request registers a new working directory mid-session</li> <li>Added <code>mcp_server_errors</code> to the headless stream-json init event, listing <code>--mcp-config</c
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