diff --git a/ext/data/schemas/options-schema.json b/ext/data/schemas/options-schema.json
index 9bdf8747..52e5fa1f 100644
--- a/ext/data/schemas/options-schema.json
+++ b/ext/data/schemas/options-schema.json
@@ -812,6 +812,7 @@
                                     "terms",
                                     "kanji",
                                     "duplicateScope",
+                                    "duplicateScopeCheckAllModels",
                                     "checkForDuplicates",
                                     "fieldTemplates",
                                     "suspendNewCards",
@@ -910,6 +911,10 @@
                                         "default": "collection",
                                         "enum": ["collection", "deck", "deck-root"]
                                     },
+                                    "duplicateScopeCheckAllModels": {
+                                        "type": "boolean",
+                                        "default": false
+                                    },
                                     "checkForDuplicates": {
                                         "type": "boolean",
                                         "default": true
diff --git a/ext/js/data/anki-note-builder.js b/ext/js/data/anki-note-builder.js
index 621816d4..4bb3ddcb 100644
--- a/ext/js/data/anki-note-builder.js
+++ b/ext/js/data/anki-note-builder.js
@@ -41,6 +41,7 @@ class AnkiNoteBuilder {
         requirements=[],
         checkForDuplicates=true,
         duplicateScope='collection',
+        duplicateScopeCheckAllModels=false,
         resultOutputMode='split',
         glossaryLayoutMode='default',
         compactTags=false,
@@ -98,7 +99,8 @@ class AnkiNoteBuilder {
                 duplicateScope,
                 duplicateScopeOptions: {
                     deckName: duplicateScopeDeckName,
-                    checkChildren: duplicateScopeCheckChildren
+                    checkChildren: duplicateScopeCheckChildren,
+                    checkAllModels: duplicateScopeCheckAllModels
                 }
             }
         };
diff --git a/ext/js/data/options-util.js b/ext/js/data/options-util.js
index 36630e2f..d131d0c6 100644
--- a/ext/js/data/options-util.js
+++ b/ext/js/data/options-util.js
@@ -856,7 +856,11 @@ class OptionsUtil {
         //  Handlebars templates updated to use new media format.
         //  Added {selection-text} field marker.
         //  Added {sentence-furigana} field marker.
+        //  Added anki.duplicateScopeCheckAllModels.
         await this._applyAnkiFieldTemplatesPatch(options, '/data/templates/anki-field-templates-upgrade-v13.handlebars');
+        for (const profile of options.profiles) {
+            profile.options.anki.duplicateScopeCheckAllModels = false;
+        }
         return options;
     }
 }
diff --git a/ext/js/display/display-anki.js b/ext/js/display/display-anki.js
index b08dc952..b2ed9ec3 100644
--- a/ext/js/display/display-anki.js
+++ b/ext/js/display/display-anki.js
@@ -42,6 +42,7 @@ class DisplayAnki {
         this._glossaryLayoutMode = 'default';
         this._displayTags = 'never';
         this._duplicateScope = 'collection';
+        this._duplicateScopeCheckAllModels = false;
         this._screenshotFormat = 'png';
         this._screenshotQuality = 100;
         this._scanLength = 10;
@@ -142,7 +143,7 @@ class DisplayAnki {
     _onOptionsUpdated({options}) {
         const {
             general: {resultOutputMode, glossaryLayoutMode, compactTags},
-            anki: {tags, duplicateScope, suspendNewCards, checkForDuplicates, displayTags, kanji, terms, screenshot: {format, quality}},
+            anki: {tags, duplicateScope, duplicateScopeCheckAllModels, suspendNewCards, checkForDuplicates, displayTags, kanji, terms, screenshot: {format, quality}},
             scanning: {length: scanLength}
         } = options;
 
@@ -153,6 +154,7 @@ class DisplayAnki {
         this._glossaryLayoutMode = glossaryLayoutMode;
         this._displayTags = displayTags;
         this._duplicateScope = duplicateScope;
+        this._duplicateScopeCheckAllModels = duplicateScopeCheckAllModels;
         this._screenshotFormat = format;
         this._screenshotQuality = quality;
         this._scanLength = scanLength;
@@ -561,6 +563,7 @@ class DisplayAnki {
             tags: this._noteTags,
             checkForDuplicates: this._checkForDuplicates,
             duplicateScope: this._duplicateScope,
+            duplicateScopeCheckAllModels: this._duplicateScopeCheckAllModels,
             resultOutputMode: this._resultOutputMode,
             glossaryLayoutMode: this._glossaryLayoutMode,
             compactTags: this._compactTags,
diff --git a/ext/settings.html b/ext/settings.html
index d392b0c0..7380b753 100644
--- a/ext/settings.html
+++ b/ext/settings.html
@@ -1494,6 +1494,28 @@
                 </div>
             </div>
             <div class="settings-item-children settings-item-children-group" id="anki-card-duplicate-options" hidden>
+                <div class="settings-item">
+                    <div class="settings-item-inner">
+                        <div class="settings-item-left">
+                            <div class="settings-item-label">
+                                Check for duplicates across all models
+                                <a class="more-toggle more-only" data-parent-distance="4">(?)</a>
+                            </div>
+                        </div>
+                        <div class="settings-item-right">
+                            <label class="toggle"><input type="checkbox" data-setting="anki.duplicateScopeCheckAllModels"><span class="toggle-body"><span class="toggle-track"></span><span class="toggle-knob"></span></span></label>
+                        </div>
+                    </div>
+                    <div class="settings-item-children more" hidden>
+                        <p>
+                            By default, duplicate checks are only performed for notes created with the same model.
+                            Enabling this option will check for duplicates across <em>all</em> model types.
+                        </p>
+                        <p>
+                            <a class="more-toggle" data-parent-distance="3">Less&hellip;</a>
+                        </p>
+                    </div>
+                </div>
                 <div class="settings-item">
                     <div class="settings-item-inner settings-item-inner-wrappable">
                         <div class="settings-item-left">
diff --git a/test/test-anki-note-builder.js b/test/test-anki-note-builder.js
index c7d91325..4433e3e6 100644
--- a/test/test-anki-note-builder.js
+++ b/test/test-anki-note-builder.js
@@ -236,6 +236,7 @@ async function getRenderResults(dictionaryEntries, type, mode, template, AnkiNot
             tags: ['yomichan'],
             checkForDuplicates: true,
             duplicateScope: 'collection',
+            duplicateScopeCheckAllModels: false,
             resultOutputMode: mode,
             glossaryLayoutMode: 'default',
             compactTags: false
diff --git a/test/test-options-util.js b/test/test-options-util.js
index 5c411c23..10881af9 100644
--- a/test/test-options-util.js
+++ b/test/test-options-util.js
@@ -444,6 +444,7 @@ function createProfileOptionsUpdatedTestData1() {
             terms: {deck: '', model: '', fields: {}},
             kanji: {deck: '', model: '', fields: {}},
             duplicateScope: 'collection',
+            duplicateScopeCheckAllModels: false,
             displayTags: 'never',
             checkForDuplicates: true,
             fieldTemplates: null,