What probably matters to youSection of the release
What
Model-source attribution logic now recognizes environment variables shaped like ANTHROPIC_DEFAULT_[A-Z]+_MODEL (for example a variable ending in _MODEL). When the organization's model-attribution mode is set to env and the active model matches one of these variables, the reported source is now settings_env_default instead of falling through to remap/agent/settings-based logic.
Why
This gives clearer, more accurate reporting of why a particular model was selected when it comes from an ANTHROPIC_DEFAULT_*_MODEL environment variable set via managed settings, rather than lumping it in with unrelated attribution sources.
