diff --git a/RESOURCES/FEATURE_FLAGS.md b/RESOURCES/FEATURE_FLAGS.md
index 5c286ffa96487..6ce8c1c1ee2dc 100644
--- a/RESOURCES/FEATURE_FLAGS.md
+++ b/RESOURCES/FEATURE_FLAGS.md
@@ -84,7 +84,6 @@ These features flags currently default to True and **will be removed in a future
 [//]: # "PLEASE KEEP THE LIST SORTED ALPHABETICALLY"
 
 - DASHBOARD_CROSS_FILTERS
-- DASHBOARD_FILTERS_EXPERIMENTAL
 - DASHBOARD_NATIVE_FILTERS
 - ENABLE_JAVASCRIPT_CONTROLS
 - GENERIC_CHART_AXES
diff --git a/UPDATING.md b/UPDATING.md
index 7e5e2ea472d75..05d56bdc3f90a 100644
--- a/UPDATING.md
+++ b/UPDATING.md
@@ -30,6 +30,7 @@ assists people when migrating to a new version.
 
 ### Breaking Changes
 
+- [26330](https://github.com/apache/superset/issues/26330): Removes the deprecated `DASHBOARD_FILTERS_EXPERIMENTAL` feature flag. The previous value of the feature flag was `False` and now the feature is permanently removed.
 - [26344](https://github.com/apache/superset/issues/26344): Removes the deprecated `ENABLE_EXPLORE_JSON_CSRF_PROTECTION` feature flag. The previous value of the feature flag was `False` and now the feature is permanently removed.
 - [26345](https://github.com/apache/superset/issues/26345): Removes the deprecated `ENABLE_TEMPLATE_REMOVE_FILTERS` feature flag. The previous value of the feature flag was `True` and now the feature is permanently enabled.
 - [26346](https://github.com/apache/superset/issues/26346): Removes the deprecated `REMOVE_SLICE_LEVEL_LABEL_COLORS` feature flag. The previous value of the feature flag was `False` and now the feature is permanently removed.
diff --git a/superset-frontend/packages/superset-ui-core/src/utils/featureFlags.ts b/superset-frontend/packages/superset-ui-core/src/utils/featureFlags.ts
index b2001ec4c136a..6d5935f04eac6 100644
--- a/superset-frontend/packages/superset-ui-core/src/utils/featureFlags.ts
+++ b/superset-frontend/packages/superset-ui-core/src/utils/featureFlags.ts
@@ -29,7 +29,6 @@ export enum FeatureFlag {
   CONFIRM_DASHBOARD_DIFF = 'CONFIRM_DASHBOARD_DIFF',
   /** @deprecated */
   DASHBOARD_CROSS_FILTERS = 'DASHBOARD_CROSS_FILTERS',
-  DASHBOARD_FILTERS_EXPERIMENTAL = 'DASHBOARD_FILTERS_EXPERIMENTAL',
   DASHBOARD_NATIVE_FILTERS = 'DASHBOARD_NATIVE_FILTERS',
   DASHBOARD_VIRTUALIZATION = 'DASHBOARD_VIRTUALIZATION',
   DASHBOARD_RBAC = 'DASHBOARD_RBAC',
diff --git a/superset-frontend/src/dashboard/components/nativeFilters/utils.test.ts b/superset-frontend/src/dashboard/components/nativeFilters/utils.test.ts
index 7219ae360b764..0388565595ff4 100644
--- a/superset-frontend/src/dashboard/components/nativeFilters/utils.test.ts
+++ b/superset-frontend/src/dashboard/components/nativeFilters/utils.test.ts
@@ -94,10 +94,7 @@ describe('nativeFilterGate', () => {
       isFeatureEnabledMock = jest
         .spyOn(uiCore, 'isFeatureEnabled')
         .mockImplementation((featureFlag: FeatureFlag) =>
-          [
-            FeatureFlag.DASHBOARD_CROSS_FILTERS,
-            FeatureFlag.DASHBOARD_FILTERS_EXPERIMENTAL,
-          ].includes(featureFlag),
+          [FeatureFlag.DASHBOARD_CROSS_FILTERS].includes(featureFlag),
         );
     });
 
diff --git a/superset-frontend/src/dashboard/components/nativeFilters/utils.ts b/superset-frontend/src/dashboard/components/nativeFilters/utils.ts
index 9e1108366d3ef..12f6d33e20b0c 100644
--- a/superset-frontend/src/dashboard/components/nativeFilters/utils.ts
+++ b/superset-frontend/src/dashboard/components/nativeFilters/utils.ts
@@ -151,8 +151,7 @@ export function getExtraFormData(
 export function nativeFilterGate(behaviors: Behavior[]): boolean {
   return (
     !behaviors.includes(Behavior.NATIVE_FILTER) ||
-    (isFeatureEnabled(FeatureFlag.DASHBOARD_FILTERS_EXPERIMENTAL) &&
-      isFeatureEnabled(FeatureFlag.DASHBOARD_CROSS_FILTERS) &&
+    (isFeatureEnabled(FeatureFlag.DASHBOARD_CROSS_FILTERS) &&
       behaviors.includes(Behavior.INTERACTIVE_CHART))
   );
 }
diff --git a/superset-frontend/src/filters/components/GroupBy/GroupByFilterPlugin.tsx b/superset-frontend/src/filters/components/GroupBy/GroupByFilterPlugin.tsx
deleted file mode 100644
index dfc314024ec9f..0000000000000
--- a/superset-frontend/src/filters/components/GroupBy/GroupByFilterPlugin.tsx
+++ /dev/null
@@ -1,130 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-import {
-  ensureIsArray,
-  ExtraFormData,
-  getColumnLabel,
-  t,
-  tn,
-} from '@superset-ui/core';
-import React, { useEffect, useState } from 'react';
-import { FormItemProps } from 'antd/lib/form';
-import { Select } from 'src/components';
-import { FilterPluginStyle, StyledFormItem, StatusMessage } from '../common';
-import { PluginFilterGroupByProps } from './types';
-
-export default function PluginFilterGroupBy(props: PluginFilterGroupByProps) {
-  const {
-    data,
-    formData,
-    height,
-    width,
-    setDataMask,
-    setHoveredFilter,
-    unsetHoveredFilter,
-    setFocusedFilter,
-    unsetFocusedFilter,
-    setFilterActive,
-    filterState,
-    inputRef,
-  } = props;
-  const { defaultValue, multiSelect } = formData;
-
-  const [value, setValue] = useState<string[]>(defaultValue ?? []);
-
-  const handleChange = (value?: string[] | string | null) => {
-    const resultValue: string[] = ensureIsArray<string>(value);
-    setValue(resultValue);
-    const extraFormData: ExtraFormData = {};
-    if (resultValue.length) {
-      extraFormData.interactive_groupby = resultValue;
-    }
-
-    setDataMask({
-      filterState: { value: resultValue.length ? resultValue : null },
-      extraFormData,
-    });
-  };
-
-  useEffect(() => {
-    handleChange(filterState.value);
-  }, [JSON.stringify(filterState.value), multiSelect]);
-
-  useEffect(() => {
-    handleChange(defaultValue ?? null);
-    // I think after Config Modal update some filter it re-creates default value for all other filters
-    // so we can process it like this `JSON.stringify` or start to use `Immer`
-  }, [JSON.stringify(defaultValue), multiSelect]);
-
-  const groupbys = ensureIsArray(formData.groupby).map(getColumnLabel);
-  const groupby = groupbys[0]?.length ? groupbys[0] : null;
-
-  const withData = groupby
-    ? data.filter(row => groupby.includes(row.column_name as string))
-    : data;
-
-  const columns = data ? withData : [];
-
-  const placeholderText =
-    columns.length === 0
-      ? t('No columns')
-      : tn('%s option', '%s options', columns.length, columns.length);
-
-  const formItemData: FormItemProps = {};
-  if (filterState.validateMessage) {
-    formItemData.extra = (
-      <StatusMessage status={filterState.validateStatus}>
-        {filterState.validateMessage}
-      </StatusMessage>
-    );
-  }
-  const options = columns.map(
-    (row: { column_name: string; verbose_name: string | null }) => {
-      const { column_name: columnName, verbose_name: verboseName } = row;
-      return {
-        label: verboseName ?? columnName,
-        value: columnName,
-      };
-    },
-  );
-  return (
-    <FilterPluginStyle height={height} width={width}>
-      <StyledFormItem
-        validateStatus={filterState.validateStatus}
-        {...formItemData}
-      >
-        <Select
-          allowClear
-          value={value}
-          placeholder={placeholderText}
-          mode={multiSelect ? 'multiple' : undefined}
-          // @ts-ignore
-          onChange={handleChange}
-          onBlur={unsetFocusedFilter}
-          onFocus={setFocusedFilter}
-          onMouseEnter={setHoveredFilter}
-          onMouseLeave={unsetHoveredFilter}
-          ref={inputRef}
-          options={options}
-          onDropdownVisibleChange={setFilterActive}
-        />
-      </StyledFormItem>
-    </FilterPluginStyle>
-  );
-}
diff --git a/superset-frontend/src/filters/components/GroupBy/buildQuery.ts b/superset-frontend/src/filters/components/GroupBy/buildQuery.ts
deleted file mode 100644
index b6ca68a87450e..0000000000000
--- a/superset-frontend/src/filters/components/GroupBy/buildQuery.ts
+++ /dev/null
@@ -1,45 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-import { buildQueryContext, QueryFormData } from '@superset-ui/core';
-
-/**
- * The buildQuery function is used to create an instance of QueryContext that's
- * sent to the chart data endpoint. In addition to containing information of which
- * datasource to use, it specifies the type (e.g. full payload, samples, query) and
- * format (e.g. CSV or JSON) of the result and whether or not to force refresh the data from
- * the datasource as opposed to using a cached copy of the data, if available.
- *
- * More importantly though, QueryContext contains a property `queries`, which is an array of
- * QueryObjects specifying individual data requests to be made. A QueryObject specifies which
- * columns, metrics and filters, among others, to use during the query. Usually it will be enough
- * to specify just one query based on the baseQueryObject, but for some more advanced use cases
- * it is possible to define post processing operations in the QueryObject, or multiple queries
- * if a viz needs multiple different result sets.
- */
-export default function buildQuery(formData: QueryFormData) {
-  return buildQueryContext(formData, baseQueryObject => [
-    {
-      ...baseQueryObject,
-      result_type: 'columns',
-      columns: [],
-      metrics: [],
-      orderby: [],
-    },
-  ]);
-}
diff --git a/superset-frontend/src/filters/components/GroupBy/controlPanel.ts b/superset-frontend/src/filters/components/GroupBy/controlPanel.ts
deleted file mode 100644
index 5b26f9cdcfaab..0000000000000
--- a/superset-frontend/src/filters/components/GroupBy/controlPanel.ts
+++ /dev/null
@@ -1,86 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-import {
-  ControlPanelConfig,
-  sections,
-  sharedControls,
-} from '@superset-ui/chart-controls';
-import { t } from '@superset-ui/core';
-import { DEFAULT_FORM_DATA } from './types';
-
-const { multiSelect } = DEFAULT_FORM_DATA;
-
-const config: ControlPanelConfig = {
-  controlPanelSections: [
-    // @ts-ignore
-    sections.legacyRegularTime,
-    {
-      label: t('Query'),
-      expanded: true,
-      controlSetRows: [
-        [
-          {
-            name: 'groupby',
-            config: {
-              ...sharedControls.groupby,
-              label: t('Columns to show'),
-              multiple: true,
-              required: false,
-            },
-          },
-        ],
-      ],
-    },
-    {
-      label: t('UI Configuration'),
-      expanded: true,
-      controlSetRows: [
-        [
-          {
-            name: 'multiSelect',
-            config: {
-              type: 'CheckboxControl',
-              label: t('Can select multiple values'),
-              default: multiSelect,
-              affectsDataMask: true,
-              resetConfig: true,
-              renderTrigger: true,
-            },
-          },
-        ],
-        [
-          {
-            name: 'enableEmptyFilter',
-            config: {
-              type: 'CheckboxControl',
-              label: t('Filter value is required'),
-              default: false,
-              renderTrigger: true,
-              description: t(
-                'User must select a value before applying the filter',
-              ),
-            },
-          },
-        ],
-      ],
-    },
-  ],
-};
-
-export default config;
diff --git a/superset-frontend/src/filters/components/GroupBy/images/thumbnail.png b/superset-frontend/src/filters/components/GroupBy/images/thumbnail.png
deleted file mode 100644
index 7afef30bd4e6e..0000000000000
Binary files a/superset-frontend/src/filters/components/GroupBy/images/thumbnail.png and /dev/null differ
diff --git a/superset-frontend/src/filters/components/GroupBy/index.ts b/superset-frontend/src/filters/components/GroupBy/index.ts
deleted file mode 100644
index 30e3ac05c4df0..0000000000000
--- a/superset-frontend/src/filters/components/GroupBy/index.ts
+++ /dev/null
@@ -1,43 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-import { Behavior, ChartMetadata, ChartPlugin, t } from '@superset-ui/core';
-import buildQuery from './buildQuery';
-import controlPanel from './controlPanel';
-import transformProps from './transformProps';
-import thumbnail from './images/thumbnail.png';
-
-export default class FilterGroupByPlugin extends ChartPlugin {
-  constructor() {
-    const metadata = new ChartMetadata({
-      name: t('Group By'),
-      description: t('Group By filter plugin'),
-      behaviors: [Behavior.INTERACTIVE_CHART, Behavior.NATIVE_FILTER],
-      tags: [t('Experimental')],
-      thumbnail,
-    });
-
-    super({
-      buildQuery,
-      controlPanel,
-      loadChart: () => import('./GroupByFilterPlugin'),
-      metadata,
-      transformProps,
-    });
-  }
-}
diff --git a/superset-frontend/src/filters/components/GroupBy/transformProps.ts b/superset-frontend/src/filters/components/GroupBy/transformProps.ts
deleted file mode 100644
index 1f502602734eb..0000000000000
--- a/superset-frontend/src/filters/components/GroupBy/transformProps.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-import { ChartProps } from '@superset-ui/core';
-import { noOp } from 'src/utils/common';
-import { DEFAULT_FORM_DATA } from './types';
-
-export default function transformProps(chartProps: ChartProps) {
-  const {
-    behaviors,
-    formData,
-    height,
-    hooks,
-    queriesData,
-    width,
-    filterState,
-    inputRef,
-  } = chartProps;
-  const {
-    setDataMask = noOp,
-    setHoveredFilter = noOp,
-    unsetHoveredFilter = noOp,
-    setFocusedFilter = noOp,
-    unsetFocusedFilter = noOp,
-    setFilterActive = noOp,
-  } = hooks;
-
-  const { data } = queriesData[0];
-
-  return {
-    filterState,
-    behaviors,
-    width,
-    height,
-    data,
-    formData: { ...DEFAULT_FORM_DATA, ...formData },
-    setDataMask,
-    setHoveredFilter,
-    unsetHoveredFilter,
-    setFocusedFilter,
-    unsetFocusedFilter,
-    setFilterActive,
-    inputRef,
-  };
-}
diff --git a/superset-frontend/src/filters/components/GroupBy/types.ts b/superset-frontend/src/filters/components/GroupBy/types.ts
deleted file mode 100644
index 5775edaa2f332..0000000000000
--- a/superset-frontend/src/filters/components/GroupBy/types.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-import {
-  Behavior,
-  DataRecord,
-  FilterState,
-  QueryFormData,
-} from '@superset-ui/core';
-import { RefObject } from 'react';
-import { PluginFilterHooks, PluginFilterStylesProps } from '../types';
-
-interface PluginFilterGroupByCustomizeProps {
-  defaultValue?: string[] | null;
-  inputRef?: RefObject<HTMLInputElement>;
-  multiSelect: boolean;
-}
-
-export type PluginFilterGroupByQueryFormData = QueryFormData &
-  PluginFilterStylesProps &
-  PluginFilterGroupByCustomizeProps;
-
-export type PluginFilterGroupByProps = PluginFilterStylesProps & {
-  behaviors: Behavior[];
-  data: DataRecord[];
-  filterState: FilterState;
-  formData: PluginFilterGroupByQueryFormData;
-  inputRef: RefObject<HTMLInputElement>;
-} & PluginFilterHooks;
-
-export const DEFAULT_FORM_DATA: PluginFilterGroupByCustomizeProps = {
-  defaultValue: null,
-  multiSelect: false,
-};
diff --git a/superset-frontend/src/filters/components/index.ts b/superset-frontend/src/filters/components/index.ts
index 11ad1a4fb588a..662b7a8b59c7a 100644
--- a/superset-frontend/src/filters/components/index.ts
+++ b/superset-frontend/src/filters/components/index.ts
@@ -20,5 +20,4 @@ export { default as SelectFilterPlugin } from './Select';
 export { default as RangeFilterPlugin } from './Range';
 export { default as TimeFilterPlugin } from './Time';
 export { default as TimeColumnFilterPlugin } from './TimeColumn';
-export { default as GroupByFilterPlugin } from './GroupBy';
 export { default as TimeGrainFilterPlugin } from './TimeGrain';
diff --git a/superset-frontend/src/visualizations/presets/MainPreset.js b/superset-frontend/src/visualizations/presets/MainPreset.js
index 4e25ef0188009..a8cc847c8b4c9 100644
--- a/superset-frontend/src/visualizations/presets/MainPreset.js
+++ b/superset-frontend/src/visualizations/presets/MainPreset.js
@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-import { isFeatureEnabled, Preset, FeatureFlag } from '@superset-ui/core';
+import { Preset } from '@superset-ui/core';
 import CalendarChartPlugin from '@superset-ui/legacy-plugin-chart-calendar';
 import ChordChartPlugin from '@superset-ui/legacy-plugin-chart-chord';
 import CountryMapChartPlugin from '@superset-ui/legacy-plugin-chart-country-map';
@@ -73,7 +73,6 @@ import {
   TimeFilterPlugin,
   TimeColumnFilterPlugin,
   TimeGrainFilterPlugin,
-  GroupByFilterPlugin,
 } from 'src/filters/components';
 import { PivotTableChartPlugin as PivotTableChartPluginV2 } from '@superset-ui/plugin-chart-pivot-table';
 import { HandlebarsChartPlugin } from '@superset-ui/plugin-chart-handlebars';
@@ -82,12 +81,6 @@ import TimeTableChartPlugin from '../TimeTable';
 
 export default class MainPreset extends Preset {
   constructor() {
-    const experimentalplugins = isFeatureEnabled(
-      FeatureFlag.DASHBOARD_FILTERS_EXPERIMENTAL,
-    )
-      ? [new GroupByFilterPlugin().configure({ key: 'filter_groupby' })]
-      : [];
-
     super({
       name: 'Legacy charts',
       presets: [new DeckGLChartPreset()],
@@ -164,7 +157,6 @@ export default class MainPreset extends Preset {
         new EchartsSunburstChartPlugin().configure({ key: 'sunburst_v2' }),
         new HandlebarsChartPlugin().configure({ key: 'handlebars' }),
         new EchartsBubbleChartPlugin().configure({ key: 'bubble_v2' }),
-        ...experimentalplugins,
       ],
     });
   }
diff --git a/superset/config.py b/superset/config.py
index 5a103d52ef844..7f1d98a3207ac 100644
--- a/superset/config.py
+++ b/superset/config.py
@@ -434,7 +434,6 @@ class D3Format(TypedDict, total=False):
     "ESCAPE_MARKDOWN_HTML": False,
     "DASHBOARD_NATIVE_FILTERS": True,  # deprecated
     "DASHBOARD_CROSS_FILTERS": True,  # deprecated
-    "DASHBOARD_FILTERS_EXPERIMENTAL": False,  # deprecated
     "DASHBOARD_VIRTUALIZATION": True,
     "GLOBAL_ASYNC_QUERIES": False,
     "VERSIONED_EXPORT": True,  # deprecated