diff --git a/packages/primevue/src/multiselect/BaseMultiSelect.vue b/packages/primevue/src/multiselect/BaseMultiSelect.vue
index d4a0c0b74..a8a6bc616 100644
--- a/packages/primevue/src/multiselect/BaseMultiSelect.vue
+++ b/packages/primevue/src/multiselect/BaseMultiSelect.vue
@@ -1,12 +1,11 @@
 <script>
-import BaseComponent from '@primevue/core/basecomponent';
+import BaseInput from '@primevue/core/baseinput';
 import MultiSelectStyle from 'primevue/multiselect/style';
 
 export default {
     name: 'BaseMultiSelect',
-    extends: BaseComponent,
+    extends: BaseInput,
     props: {
-        modelValue: null,
         options: Array,
         optionLabel: null,
         optionValue: null,
@@ -18,22 +17,6 @@ export default {
             default: '14rem'
         },
         placeholder: String,
-        variant: {
-            type: String,
-            default: null
-        },
-        invalid: {
-            type: Boolean,
-            default: false
-        },
-        disabled: {
-            type: Boolean,
-            default: false
-        },
-        fluid: {
-            type: Boolean,
-            default: null
-        },
         inputId: {
             type: String,
             default: null
diff --git a/packages/primevue/src/multiselect/MultiSelect.vue b/packages/primevue/src/multiselect/MultiSelect.vue
index 25abaacdf..2519f4efe 100755
--- a/packages/primevue/src/multiselect/MultiSelect.vue
+++ b/packages/primevue/src/multiselect/MultiSelect.vue
@@ -25,7 +25,7 @@
         </div>
         <div :class="cx('labelContainer')" v-bind="ptm('labelContainer')">
             <div :class="cx('label')" v-bind="ptm('label')">
-                <slot name="value" :value="modelValue" :placeholder="placeholder">
+                <slot name="value" :value="d_value" :placeholder="placeholder">
                     <template v-if="display === 'comma'">
                         {{ label || 'empty' }}
                     </template>
@@ -34,7 +34,7 @@
                             <span>{{ label }}</span>
                         </template>
                         <template v-else>
-                            <span v-for="item of modelValue" :key="getLabelByValue(item)" :class="cx('chipItem')" v-bind="ptm('chipItem')">
+                            <span v-for="item of d_value" :key="getLabelByValue(item)" :class="cx('chipItem')" v-bind="ptm('chipItem')">
                                 <slot name="chip" :value="item" :removeCallback="(event) => removeOption(event, item)">
                                     <!-- TODO: removetokenicon and removeTokenIcon  deprecated since v4.0. Use chipicon slot and chipIcon prop-->
                                     <Chip :class="cx('pcChip')" :label="getLabelByValue(item)" :removeIcon="chipIcon || removeTokenIcon" removable :unstyled="unstyled" @remove="removeOption($event, item)" :pt="ptm('pcChip')">
@@ -45,7 +45,7 @@
                                 </slot>
                             </span>
                         </template>
-                        <template v-if="!modelValue || modelValue.length === 0">{{ placeholder || 'empty' }}</template>
+                        <template v-if="!d_value || d_value.length === 0">{{ placeholder || 'empty' }}</template>
                     </template>
                 </slot>
             </div>
@@ -73,7 +73,7 @@
                         :data-p-hidden-accessible="true"
                         :data-p-hidden-focusable="true"
                     ></span>
-                    <slot name="header" :value="modelValue" :options="visibleOptions"></slot>
+                    <slot name="header" :value="d_value" :options="visibleOptions"></slot>
                     <div v-if="(showToggleAll && selectionLimit == null) || filter" :class="cx('header')" v-bind="ptm('header')">
                         <Checkbox
                             v-if="showToggleAll && selectionLimit == null"
@@ -185,7 +185,7 @@
                             </template>
                         </VirtualScroller>
                     </div>
-                    <slot name="footer" :value="modelValue" :options="visibleOptions"></slot>
+                    <slot name="footer" :value="d_value" :options="visibleOptions"></slot>
                     <span v-if="!options || (options && options.length === 0)" role="status" aria-live="polite" class="p-hidden-accessible" v-bind="ptm('hiddenEmptyMessage')" :data-p-hidden-accessible="true">
                         {{ emptyMessageText }}
                     </span>
@@ -235,7 +235,7 @@ export default {
     name: 'MultiSelect',
     extends: BaseMultiSelect,
     inheritAttrs: false,
-    emits: ['update:modelValue', 'change', 'focus', 'blur', 'before-show', 'before-hide', 'show', 'hide', 'filter', 'selectall-change'],
+    emits: ['change', 'focus', 'blur', 'before-show', 'before-hide', 'show', 'hide', 'filter', 'selectall-change'],
     inject: {
         $pcFluid: { default: null }
     },
@@ -377,6 +377,7 @@ export default {
             this.focusedOptionIndex = -1;
             this.searchValue = '';
             this.$emit('blur', event);
+            this.formField.onBlur?.();
         },
         onKeyDown(event) {
             if (this.disabled) {
@@ -481,8 +482,8 @@ export default {
             let selected = this.isSelected(option);
             let value = null;
 
-            if (selected) value = this.modelValue.filter((val) => !equals(val, this.getOptionValue(option), this.equalityKey));
-            else value = [...(this.modelValue || []), this.getOptionValue(option)];
+            if (selected) value = this.d_value.filter((val) => !equals(val, this.getOptionValue(option), this.equalityKey));
+            else value = [...(this.d_value || []), this.getOptionValue(option)];
 
             this.updateModel(event, value);
             index !== -1 && (this.focusedOptionIndex = index);
@@ -814,7 +815,7 @@ export default {
             const selectedItemsLabel = this.selectedItemsLabel || this.$primevue.config.locale.selectionMessage;
 
             if (pattern.test(selectedItemsLabel)) {
-                return selectedItemsLabel.replace(selectedItemsLabel.match(pattern)[0], this.modelValue.length + '');
+                return selectedItemsLabel.replace(selectedItemsLabel.match(pattern)[0], this.d_value.length + '');
             }
 
             return selectedItemsLabel;
@@ -830,7 +831,7 @@ export default {
         },
         removeOption(event, optionValue) {
             event.stopPropagation();
-            let value = this.modelValue.filter((val) => !equals(val, optionValue, this.equalityKey));
+            let value = this.d_value.filter((val) => !equals(val, optionValue, this.equalityKey));
 
             this.updateModel(event, value);
         },
@@ -855,7 +856,7 @@ export default {
         isSelected(option) {
             const optionValue = this.getOptionValue(option);
 
-            return (this.modelValue || []).some((value) => this.isEquals(value, optionValue));
+            return (this.d_value || []).some((value) => this.isEquals(value, optionValue));
         },
         findFirstOptionIndex() {
             return this.visibleOptions.findIndex((option) => this.isValidOption(option));
@@ -874,9 +875,9 @@ export default {
             return matchedOptionIndex > -1 ? matchedOptionIndex : index;
         },
         findSelectedOptionIndex() {
-            if (this.hasSelectedOption) {
-                for (let index = this.modelValue.length - 1; index >= 0; index--) {
-                    const value = this.modelValue[index];
+            if (this.$filled) {
+                for (let index = this.d_value.length - 1; index >= 0; index--) {
+                    const value = this.d_value[index];
                     const matchedOptionIndex = this.visibleOptions.findIndex((option) => this.isValidSelectedOption(option) && this.isEquals(value, this.getOptionValue(option)));
 
                     if (matchedOptionIndex > -1) return matchedOptionIndex;
@@ -886,25 +887,25 @@ export default {
             return -1;
         },
         findFirstSelectedOptionIndex() {
-            return this.hasSelectedOption ? this.visibleOptions.findIndex((option) => this.isValidSelectedOption(option)) : -1;
+            return this.$filled ? this.visibleOptions.findIndex((option) => this.isValidSelectedOption(option)) : -1;
         },
         findLastSelectedOptionIndex() {
-            return this.hasSelectedOption ? findLastIndex(this.visibleOptions, (option) => this.isValidSelectedOption(option)) : -1;
+            return this.$filled ? findLastIndex(this.visibleOptions, (option) => this.isValidSelectedOption(option)) : -1;
         },
         findNextSelectedOptionIndex(index) {
-            const matchedOptionIndex = this.hasSelectedOption && index < this.visibleOptions.length - 1 ? this.visibleOptions.slice(index + 1).findIndex((option) => this.isValidSelectedOption(option)) : -1;
+            const matchedOptionIndex = this.$filled && index < this.visibleOptions.length - 1 ? this.visibleOptions.slice(index + 1).findIndex((option) => this.isValidSelectedOption(option)) : -1;
 
             return matchedOptionIndex > -1 ? matchedOptionIndex + index + 1 : -1;
         },
         findPrevSelectedOptionIndex(index) {
-            const matchedOptionIndex = this.hasSelectedOption && index > 0 ? findLastIndex(this.visibleOptions.slice(0, index), (option) => this.isValidSelectedOption(option)) : -1;
+            const matchedOptionIndex = this.$filled && index > 0 ? findLastIndex(this.visibleOptions.slice(0, index), (option) => this.isValidSelectedOption(option)) : -1;
 
             return matchedOptionIndex > -1 ? matchedOptionIndex : -1;
         },
         findNearestSelectedOptionIndex(index, firstCheckUp = false) {
             let matchedOptionIndex = -1;
 
-            if (this.hasSelectedOption) {
+            if (this.$filled) {
                 if (firstCheckUp) {
                     matchedOptionIndex = this.findPrevSelectedOptionIndex(index);
                     matchedOptionIndex = matchedOptionIndex === -1 ? this.findNextSelectedOptionIndex(index) : matchedOptionIndex;
@@ -980,7 +981,7 @@ export default {
             });
         },
         autoUpdateModel() {
-            if (this.selectOnFocus && this.autoOptionFocus && !this.hasSelectedOption) {
+            if (this.selectOnFocus && this.autoOptionFocus && !this.$filled) {
                 this.focusedOptionIndex = this.findFirstFocusedOptionIndex();
                 const value = this.getOptionValue(this.visibleOptions[this.focusedOptionIndex]);
 
@@ -988,7 +989,7 @@ export default {
             }
         },
         updateModel(event, value) {
-            this.$emit('update:modelValue', value);
+            this.updateValue(value, event);
             this.$emit('change', { originalEvent: event, value });
         },
         flatOptions(options) {
@@ -1043,18 +1044,18 @@ export default {
             // TODO: Refactor
             let label;
 
-            if (this.modelValue && this.modelValue.length) {
-                if (isNotEmpty(this.maxSelectedLabels) && this.modelValue.length > this.maxSelectedLabels) {
+            if (this.d_value && this.d_value.length) {
+                if (isNotEmpty(this.maxSelectedLabels) && this.d_value.length > this.maxSelectedLabels) {
                     return this.getSelectedItemsLabel();
                 } else {
                     label = '';
 
-                    for (let i = 0; i < this.modelValue.length; i++) {
+                    for (let i = 0; i < this.d_value.length; i++) {
                         if (i !== 0) {
                             label += ', ';
                         }
 
-                        label += this.getLabelByValue(this.modelValue[i]);
+                        label += this.getLabelByValue(this.d_value[i]);
                     }
                 }
             } else {
@@ -1064,13 +1065,14 @@ export default {
             return label;
         },
         chipSelectedItems() {
-            return isNotEmpty(this.maxSelectedLabels) && this.modelValue && this.modelValue.length > this.maxSelectedLabels;
+            return isNotEmpty(this.maxSelectedLabels) && this.d_value && this.d_value.length > this.maxSelectedLabels;
         },
         allSelected() {
             return this.selectAll !== null ? this.selectAll : isNotEmpty(this.visibleOptions) && this.visibleOptions.every((option) => this.isOptionGroup(option) || this.isOptionDisabled(option) || this.isSelected(option));
         },
+        // @deprecated use $filled instead.
         hasSelectedOption() {
-            return isNotEmpty(this.modelValue);
+            return this.$filled;
         },
         equalityKey() {
             return this.optionValue ? null : this.dataKey;
@@ -1079,7 +1081,7 @@ export default {
             return this.filterFields || [this.optionLabel];
         },
         maxSelectionLimitReached() {
-            return this.selectionLimit && this.modelValue && this.modelValue.length === this.selectionLimit;
+            return this.selectionLimit && this.d_value && this.d_value.length === this.selectionLimit;
         },
         filterResultMessageText() {
             return isNotEmpty(this.visibleOptions) ? this.filterMessageText.replaceAll('{0}', this.visibleOptions.length) : this.emptyFilterMessageText;
@@ -1100,7 +1102,7 @@ export default {
             return this.emptySelectionMessage || this.$primevue.config.locale.emptySelectionMessage || '';
         },
         selectedMessageText() {
-            return this.hasSelectedOption ? this.selectionMessageText.replaceAll('{0}', this.modelValue.length) : this.emptySelectionMessageText;
+            return this.$filled ? this.selectionMessageText.replaceAll('{0}', this.d_value.length) : this.emptySelectionMessageText;
         },
         focusedOptionId() {
             return this.focusedOptionIndex !== -1 ? `${this.id}_${this.focusedOptionIndex}` : null;
diff --git a/packages/primevue/src/multiselect/style/MultiSelectStyle.js b/packages/primevue/src/multiselect/style/MultiSelectStyle.js
index 457287a39..a2e5dcc21 100644
--- a/packages/primevue/src/multiselect/style/MultiSelectStyle.js
+++ b/packages/primevue/src/multiselect/style/MultiSelectStyle.js
@@ -210,13 +210,13 @@ const classes = {
         {
             'p-multiselect-display-chip': props.display === 'chip',
             'p-disabled': props.disabled,
-            'p-invalid': props.invalid,
-            'p-variant-filled': props.variant ? props.variant === 'filled' : instance.$primevue.config.inputStyle === 'filled' || instance.$primevue.config.inputVariant === 'filled',
+            'p-invalid': instance.$invalid,
+            'p-variant-filled': instance.$variant === 'filled',
             'p-focus': instance.focused,
-            'p-inputwrapper-filled': props.modelValue && props.modelValue.length,
+            'p-inputwrapper-filled': instance.$filled,
             'p-inputwrapper-focus': instance.focused || instance.overlayVisible,
             'p-multiselect-open': instance.overlayVisible,
-            'p-multiselect-fluid': instance.hasFluid
+            'p-multiselect-fluid': instance.$fluid
         }
     ],
     labelContainer: 'p-multiselect-label-container',