Chrome creates a 4 GB file at

~/Library/Application Support/Google/Chrome Beta/Default/OptGuideOnDeviceModel/2025.8.8.1141/weights.bin

Source: Stack Overflow

Navigate to chrome://policy/ to review available settings.

defaults write ~/Library/Preferences/com.google.Chrome.plist GenAILocalFoundationalModelSettings -int 1
defaults write ~/Library/Preferences/com.google.Chrome.plist AIModeSettings -int 1
defaults write ~/Library/Preferences/com.google.Chrome.plist FeedbackSurveysEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist PromotionsEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist ShoppingListEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist UrlKeyedAnonymizedDataCollectionEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist BuiltInAIAPIsEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist GenAiDefaultSettings -int 2
defaults write ~/Library/Preferences/com.google.Chrome.plist GoogleSearchSidePanelEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist MetricsReportingEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist NTPCardsVisible -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist PaymentMethodQueryEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist SafeBrowsingExtendedReportingEnabled -bool false
defaults write ~/Library/Preferences/com.google.Chrome.plist SafeBrowsingSurveysEnabled -bool false

Reference: Chrome Enterprise Policy • GenAILocalFoundationalModelSettings

Hat tip: Power Users community on Codidact