SpaceXAI's developer documentation and October release notes describe a new 'Custom moderation controls' option for Grok: a guidelines field on text requests through the Chat Completions and Responses APIs and the xAI Python SDK. It covers three categories — nsfw, violence and profanity — with, for now, a single behaviour, decline.

With nsfw set, Grok avoids sexual innuendo or sexualised conversation but still answers educational and clinical questions; with violence set, it avoids graphic depictions while still engaging with history and news; and with profanity set, it writes without profanity. Any category left out keeps the model's default behaviour.

The settings apply only to the request that carries them, so an app has to send them with every message, though the Python SDK can store them on a chat. They do not work with multi-agent models or deferred completions, and SpaceXAI has not announced the feature beyond its documentation or said how it tests that Grok follows the settings.