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.
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Confirmed sinceAnthropic's documentation has since written up ANTHROPIC_DEFAULT_MODEL, on Roll out an LLM gateway for your organization.| Default model and aliases | The model that new sessions start on by default, and the models that aliases such as `opus` and `sonnet` resolve to, are [built into each version](/docs/en/model-config#pin-models-for-third-party-deployments) …llm-gateway-rolloutsee the edit
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up ANTHROPIC_DEFAULT_MODEL, on Roll out an LLM gateway for your organization.
