LaunchDevelopersAugust 19, 2026

Claude Code 2.1.236 adds ANTHROPIC_DEFAULT_MODEL

Claude Code 2.1.236 adds the ANTHROPIC_DEFAULT_MODEL environment variable, which sets the model new sessions start on, while a /model pick still overrides it and persists across restarts. It also adds notify_when_idle to cross-session SendMessage and fixes several sandbox and renderer bugs.

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