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| ID | Target Name | Status |
|---|---|---|
| 0 | UNKNOWN | ❌ Missing |
| 1 | PAINFUL_PAGE_LOAD | ❌ Missing |
| 2 | LANGUAGE_DETECTION | ✅ Downloaded |
| 3 | PAGE_TOPICS | ❌ Missing |
| 4 | SEGMENTATION_NEW_TAB | ✅ Downloaded |
| 5 | SEGMENTATION_SHARE | ✅ Downloaded |
| 6 | SEGMENTATION_VOICE | ✅ Downloaded |
| 7 | MODEL_VALIDATION | ❌ Missing |
| 8 | PAGE_ENTITIES | ✅ Downloaded |
| 9 | NOTIFICATION_PERMISSION_PREDICTIONS | ✅ Downloaded |
| 10 | SEGMENTATION_DUMMY | ❌ Missing |
| 11 | SEGMENTATION_CHROME_START_ANDROID | ❌ Missing |
| 12 | SEGMENTATION_QUERY_TILES | ❌ Missing |
| 13 | PAGE_VISIBILITY | ✅ Downloaded |
| 14 | (not listed in OPTIMIZATION_TARGETS) | ❌ Missing |
| 15 | PAGE_TOPICS_V2 | ✅ Downloaded |
| 16 | SEGMENTATION_CHROME_LOW_USER_ENGAGEMENT | ✅ Downloaded |
| 17 | SEGMENTATION_FEED_USER | ❌ Missing |
| 18 | CONTEXTUAL_PAGE_ACTION_PRICE_TRACKING | ❌ Missing |
| 19 | TEXT_CLASSIFIER | ✅ Downloaded |
| 20 | GEOLOCATION_PERMISSION_PREDICTIONS | ✅ Downloaded |
| 21 | SEGMENTATION_SHOPPING_USER | ❌ Missing |
| 22 | SEGMENTATION_CHROME_START_ANDROID_V2 | ❌ Missing |
| 23 | SEGMENTATION_SEARCH_USER | ❌ Missing |
| 24 | OMNIBOX_ON_DEVICE_TAIL_SUGGEST | ✅ Downloaded |
| 25 | CLIENT_SIDE_PHISHING | ✅ Downloaded |
| 26 | OMNIBOX_URL_SCORING | ✅ Downloaded |
| 27 | SEGMENTATION_DEVICE_SWITCHER | ❌ Missing |
| 28 | SEGMENTATION_ADAPTIVE_TOOLBAR | ✅ Downloaded |
| 29 | SEGMENTATION_TABLET_PRODUCTIVITY_USER | ❌ Missing |
| 30 | CLIENT_SIDE_PHISHING_IMAGE_EMBEDDER | ✅ Downloaded |
| 31 | NEW_TAB_PAGE_HISTORY_CLUSTERS_MODULE_RANKING | ✅ Downloaded |
| 32 | WEB_APP_INSTALLATION_PROMO | ✅ Downloaded |
| 33 | TEXT_EMBEDDER | ❌ Missing |
| 34 | VISUAL_SEARCH_CLASSIFICATION | ✅ Downloaded |
| 35 | SEGMENTATION_BOTTOM_TOOLBAR | ❌ Missing |
| 36 | AUTOFILL_FIELD_CLASSIFICATION | ✅ Downloaded |
| 37 | SEGMENTATION_IOS_MODULE_RANKER | ✅ Downloaded |
| 38 | SEGMENTATION_DESKTOP_NTP_MODULE | ❌ Missing |
| 39 | PRELOADING_HEURISTICS | ✅ Downloaded |
| 40 | TEXT_SAFETY | ✅ Downloaded |
| 41 | SEGMENTATION_ANDROID_HOME_MODULE_RANKER | ❌ Missing |
| 42 | COMPOSE | ✅ Downloaded |
| 43 | PASSAGE_EMBEDDER | ✅ Downloaded |
| 44 | PHRASE_SEGMENTATION | ✅ Downloaded |
| 45 | SEGMENTATION_COMPOSE_PROMOTION | ✅ Downloaded |
| 46 | URL_VISIT_RESUMPTION_RANKER | ✅ Downloaded |
| 47 | CAMERA_BACKGROUND_SEGMENTATION | ❌ Missing |
| 48 | MODEL_EXECUTION_FEATURE_HISTORY_SEARCH | ❌ Missing |
| 49 | MODEL_EXECUTION_FEATURE_PROMPT_API | ✅ Downloaded |
| 50 | SEGMENTATION_METRICS_CLUSTERING | ✅ Downloaded |
| 51 | MODEL_EXECUTION_FEATURE_SUMMARIZE | ✅ Downloaded |
| 52 | PASSWORD_MANAGER_FORM_CLASSIFICATION | ✅ Downloaded |
| 53 | NOTIFICATION_CONTENT_DETECTION | ✅ Downloaded |
| 54 | MODEL_EXECUTION_FEATURE_HISTORY_QUERY_INTENT | ❌ Missing |
| 55 | MODEL_EXECUTION_FEATURE_SCAM_DETECTION | ✅ Downloaded |
| 56 | MODEL_EXECUTION_FEATURE_PERMISSIONS_AI | ✅ Downloaded |
| 57 | EXPERIMENTAL_EMBEDDER | ✅ Downloaded |
| 58 | SEGMENTATION_FEDCM_USER | ✅ Downloaded |
| 59 | MODEL_EXECUTION_FEATURE_WRITING_ASSISTANCE_API | ✅ Downloaded |
| 60 | GEOLOCATION_IMAGE_PERMISSION_RELEVANCE | ✅ Downloaded |
| 61 | NOTIFICATION_IMAGE_PERMISSION_RELEVANCE | ✅ Downloaded |
| 62 | MODEL_EXECUTION_FEATURE_PROOFREADER_API | ✅ Downloaded |
| 63 | SEGMENTATION_IOS_DEFAULT_BROWSER_PROMO | ❌ Missing |
| 64 | EDU_CLASSIFIER | ✅ Downloaded |
| 65 | PERMISSIONS_AIV4_GEOLOCATION_DESKTOP | ✅ Downloaded |
| 66 | PERMISSIONS_AIV4_NOTIFICATIONS_DESKTOP | ✅ Downloaded |
| 67 | GENERALIZED_SAFETY | ✅ Downloaded |
| 68 | PERMISSIONS_AIV4_GEOLOCATION_ANDROID | ✅ Downloaded |
| 69 | PERMISSIONS_AIV4_NOTIFICATIONS_ANDROID | ✅ Downloaded |
| 70 | MODEL_EXECUTION_FEATURE_ON_DEVICE_SPEECH_RECOGNITION | ✅ Downloaded |
| 71 | WEBRTC_NEURAL_RESIDUAL_ECHO_ESTIMATOR | ✅ Downloaded |
| 72 | MODEL_EXECUTION_FEATURE_CLASSIFIER | ❌ Missing |
| 73 | CONTEXTUAL_TASKS_TAB_RELEVANCE | ✅ Downloaded |
| 74 | SHOPPING_CLASSIFIER | ✅ Downloaded |
| 75 | MODEL_EXECUTION_FEATURE_ON_DEVICE_SPEECH_RECOGNITION_TINY_GEMMA | ❌ Missing |
| 76 | CONTEXTUAL_TASKS_MULTI_TURN_TAB_RELEVANCE | ❌ Missing |
| 77 | WEBRTC_VOICE_ISOLATION_DENOISER | ❌ Missing |
// The scenarios for which the optimization guide has models for.
enum OptimizationTarget {
reserved 14;
OPTIMIZATION_TARGET_UNKNOWN = 0;
// Should only be applied when the page load is predicted to be painful.
OPTIMIZATION_TARGET_PAINFUL_PAGE_LOAD = 1;
// Target for supplying the language detection model via the model downloader.
OPTIMIZATION_TARGET_LANGUAGE_DETECTION = 2;
// Target for determining topics present on a page.
OPTIMIZATION_TARGET_PAGE_TOPICS = 3;
// Target for segmentation: New tab page user.
OPTIMIZATION_TARGET_SEGMENTATION_NEW_TAB = 4;
// Target for segmentation: Share user.
OPTIMIZATION_TARGET_SEGMENTATION_SHARE = 5;
// Target for segmentation: Voice user.
OPTIMIZATION_TARGET_SEGMENTATION_VOICE = 6;
// Target for model validation.
OPTIMIZATION_TARGET_MODEL_VALIDATION = 7;
// Target for determining entities present on a page.
OPTIMIZATION_TARGET_PAGE_ENTITIES = 8;
// Target for Chrome Permissions Suggestions Service: Notification permission.
OPTIMIZATION_TARGET_NOTIFICATION_PERMISSION_PREDICTIONS = 9;
// Target that enables data collection on client side for various experiments.
OPTIMIZATION_TARGET_SEGMENTATION_DUMMY = 10;
// Target for segmentation: Chrome Android Start user.
OPTIMIZATION_TARGET_SEGMENTATION_CHROME_START_ANDROID = 11;
// Target for segmentation: Query Tiles user.
OPTIMIZATION_TARGET_SEGMENTATION_QUERY_TILES = 12;
// Target for determining the UI visibility of a page.
OPTIMIZATION_TARGET_PAGE_VISIBILITY = 13;
// Target for determining topics present on a page.
// TODO(crbug.com/40204121): Remove PAGE_TOPICS in favor of this target.
OPTIMIZATION_TARGET_PAGE_TOPICS_V2 = 15;
// Target for segmentation: Determine users with low engagement with chrome.
OPTIMIZATION_TARGET_SEGMENTATION_CHROME_LOW_USER_ENGAGEMENT = 16;
// Target for segmentation: Determine users who prefer to use Feed.
OPTIMIZATION_TARGET_SEGMENTATION_FEED_USER = 17;
// Target for segmentation: Determine whether price tracking should be shown
// as a contextual page action.
OPTIMIZATION_TARGET_CONTEXTUAL_PAGE_ACTION_PRICE_TRACKING = 18;
// Target for smart text selection and entity extraction.
OPTIMIZATION_TARGET_TEXT_CLASSIFIER = 19;
// Target for Chrome Permissions Suggestions Service: Geolocation permission.
OPTIMIZATION_TARGET_GEOLOCATION_PERMISSION_PREDICTIONS = 20;
// Target for segmentation: Determine users who are interested in shopping.
OPTIMIZATION_TARGET_SEGMENTATION_SHOPPING_USER = 21;
// Target for segmentation: Chrome Android Start user V2.
OPTIMIZATION_TARGET_SEGMENTATION_CHROME_START_ANDROID_V2 = 22;
// Target for segmentation: Determine users who use search.
OPTIMIZATION_TARGET_SEGMENTATION_SEARCH_USER = 23;
// Target for Omnibox on device tail suggest.
OPTIMIZATION_TARGET_OMNIBOX_ON_DEVICE_TAIL_SUGGEST = 24;
// Target for client side phishing
OPTIMIZATION_TARGET_CLIENT_SIDE_PHISHING = 25;
// Target for Omnibox URL suggestion scoring.
OPTIMIZATION_TARGET_OMNIBOX_URL_SCORING = 26;
// Target for segmentation: Segment of users who switched devices.
OPTIMIZATION_TARGET_SEGMENTATION_DEVICE_SWITCHER = 27;
// Target for segmentation: Adaptive toolbar button.
OPTIMIZATION_TARGET_SEGMENTATION_ADAPTIVE_TOOLBAR = 28;
// Target for segmentation: Determine users who are tabletproductivity users.
OPTIMIZATION_TARGET_SEGMENTATION_TABLET_PRODUCTIVITY_USER = 29;
// Target for client side phishing image embedding model.
OPTIMIZATION_TARGET_CLIENT_SIDE_PHISHING_IMAGE_EMBEDDER = 30;
// Target for ranking clusters that have passed minimal filtering for the New
// Tab Page History Clusters module.
OPTIMIZATION_TARGET_NEW_TAB_PAGE_HISTORY_CLUSTERS_MODULE_RANKING = 31;
// Target for web app install promotion.
OPTIMIZATION_TARGET_WEB_APP_INSTALLATION_PROMO = 32;
// Target for generic text embedder model.
OPTIMIZATION_TARGET_TEXT_EMBEDDER = 33;
// Target for classifying and extracting search images on web page.
OPTIMIZATION_TARGET_VISUAL_SEARCH_CLASSIFICATION = 34;
// Target for classifying users to target bottom toolbar.
OPTIMIZATION_TARGET_SEGMENTATION_BOTTOM_TOOLBAR = 35;
// Target for Autofill field type classification model.
OPTIMIZATION_TARGET_AUTOFILL_FIELD_CLASSIFICATION = 36;
// Target for ranking ios start page modules.
OPTIMIZATION_TARGET_SEGMENTATION_IOS_MODULE_RANKER = 37;
// Target for segmentation: Determine what modules a user should see on their
// Desktop New Tab Page.
OPTIMIZATION_TARGET_SEGMENTATION_DESKTOP_NTP_MODULE = 38;
// Target for predicting candidate links for speculation-rule based
// preloading.
OPTIMIZATION_TARGET_PRELOADING_HEURISTICS = 39;
// Target for determining text safety.
OPTIMIZATION_TARGET_TEXT_SAFETY = 40;
// Target for ranking Android home modules.
OPTIMIZATION_TARGET_SEGMENTATION_ANDROID_HOME_MODULE_RANKER = 41;
// Target to support running Compose On-Device.
OPTIMIZATION_TARGET_COMPOSE = 42;
// Target for generating passage embeddings.
OPTIMIZATION_TARGET_PASSAGE_EMBEDDER = 43;
// Target for breaking up sentences into phrases.
OPTIMIZATION_TARGET_PHRASE_SEGMENTATION = 44;
// Target to determine whether to show promotion for Compose.
OPTIMIZATION_TARGET_SEGMENTATION_COMPOSE_PROMOTION = 45;
// Target for ranking URL visits used in visit resumption features.
OPTIMIZATION_TARGET_URL_VISIT_RESUMPTION_RANKER = 46;
// Target for background segmentation of video frames.
OPTIMIZATION_TARGET_CAMERA_BACKGROUND_SEGMENTATION = 47;
// Target for History search model.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_HISTORY_SEARCH = 48;
// Target for Prompt API feature config.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_PROMPT_API = 49;
// Target for metrics based segmentation clustering.
OPTIMIZATION_TARGET_SEGMENTATION_METRICS_CLUSTERING = 50;
// Target for Summarize API feature config.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_SUMMARIZE = 51;
// Target for Password Manager form classification model.
OPTIMIZATION_TARGET_PASSWORD_MANAGER_FORM_CLASSIFICATION = 52;
// Target for model classifying notification content as suspicious.
OPTIMIZATION_TARGET_NOTIFICATION_CONTENT_DETECTION = 53;
// Target for History query intent model.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_HISTORY_QUERY_INTENT = 54;
// Target for scam detection feature config.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_SCAM_DETECTION = 55;
// Target for Permissions AI feature config.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_PERMISSIONS_AI = 56;
// Target for assessing embedding model performance.
OPTIMIZATION_TARGET_EXPERIMENTAL_EMBEDDER = 57;
// Target for segmentation: FedCM user.
OPTIMIZATION_TARGET_SEGMENTATION_FEDCM_USER = 58;
// Target for Writing Assistance APIs (Writer and Rewriter).
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_WRITING_ASSISTANCE_API = 59;
// Target for Geolocation Permission Relevance.
OPTIMIZATION_TARGET_GEOLOCATION_IMAGE_PERMISSION_RELEVANCE = 60;
// Target for Notification Permission Relevance.
OPTIMIZATION_TARGET_NOTIFICATION_IMAGE_PERMISSION_RELEVANCE = 61;
// Target for Proofreader API.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_PROOFREADER_API = 62;
// Target to determine whether to show the iOS default browser promo.
OPTIMIZATION_TARGET_SEGMENTATION_IOS_DEFAULT_BROWSER_PROMO = 63;
// Target for education classifier.
OPTIMIZATION_TARGET_EDU_CLASSIFIER = 64;
// Target for the text+image AIv4 geolocation permission feature model.
OPTIMIZATION_TARGET_PERMISSIONS_AIV4_GEOLOCATION_DESKTOP = 65;
// Target for the text+image AIv4 notifications permission feature model.
OPTIMIZATION_TARGET_PERMISSIONS_AIV4_NOTIFICATIONS_DESKTOP = 66;
// Target for a newer, generalized safety model, designed to replace the
// model associated with target `OPTIMIZATION_TARGET_TEXT_SAFETY`.
OPTIMIZATION_TARGET_GENERALIZED_SAFETY = 67;
// Target for the text+image AIv4 geolocation permission feature model.
OPTIMIZATION_TARGET_PERMISSIONS_AIV4_GEOLOCATION_ANDROID = 68;
// Target for the text+image AIv4 notifications permission feature model.
OPTIMIZATION_TARGET_PERMISSIONS_AIV4_NOTIFICATIONS_ANDROID = 69;
// Target for on-device speech recognition.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_ON_DEVICE_SPEECH_RECOGNITION = 70;
// Target for the Neural Residual Echo Estimator used in the WebRTC AEC.
OPTIMIZATION_TARGET_WEBRTC_NEURAL_RESIDUAL_ECHO_ESTIMATOR = 71;
// Target for Classifier model.
OPTIMIZATION_TARGET_MODEL_EXECUTION_FEATURE_CLASSIFIER = 72;
// Target for contextual tasks tab relevance.
OPTIMIZATION_TARGET_CONTEXTUAL_TASKS_TAB_RELEVANCE = 73;
// Target for shopping classifier.
OPTIMIZATION_TARGET_SHOPPING_CLASSIFIER = 74;
// Target for on-device speech recognition on device (Tiny Gemma).
MODEL_EXECUTION_FEATURE_ON_DEVICE_SPEECH_RECOGNITION_TINY_GEMMA = 75;
// Target for multi-turn tab relevance scoring in Gemini conversations (extends target 73)
CONTEXTUAL_TASKS_MULTI_TURN_TAB_RELEVANCE = 76;
// Target for WebRTC voice isolation denoiser
WEBRTC_VOICE_ISOLATION_DENOISER = 76;
}