diff --git a/docs/next.config.ts b/docs/next.config.ts
index 1d7eccc2083064..00ad740b2fe8fc 100644
--- a/docs/next.config.ts
+++ b/docs/next.config.ts
@@ -2,6 +2,7 @@
 import * as path from 'path';
 import * as url from 'url';
 import * as fs from 'fs';
+import * as semver from 'semver';
 // @ts-ignore
 import { BundleAnalyzerPlugin } from 'webpack-bundle-analyzer';
 import { createRequire } from 'module';
@@ -182,6 +183,7 @@ export default withDocsInfra({
   env: {
     // docs-infra
     LIB_VERSION: pkg.version,
+    SEARCH_INDEX: `material-ui-v${semver.major(pkg.version)}`,
     SOURCE_CODE_REPO: 'https://github.com/mui/material-ui',
     SOURCE_GITHUB_BRANCH: 'master', // #target-branch-reference
     GITHUB_TEMPLATE_DOCS_FEEDBACK: '4.docs-feedback.yml',
diff --git a/docs/package.json b/docs/package.json
index 4b678c7abf6d70..61d6110e449654 100644
--- a/docs/package.json
+++ b/docs/package.json
@@ -97,6 +97,7 @@
     "react-virtuoso": "^4.18.3",
     "react-window": "^2.2.7",
     "rimraf": "^6.1.3",
+    "semver": "^7.7.4",
     "styled-components": "^6.3.11",
     "stylis": "catalog:docs",
     "use-count-up": "^3.0.1",
@@ -123,6 +124,7 @@
     "@types/react-dom": "19.2.3",
     "@types/react-swipeable-views": "0.13.6",
     "@types/react-transition-group": "4.4.12",
+    "@types/semver": "^7.7.1",
     "@types/stylis": "4.2.7",
     "chai": "6.2.2",
     "cross-fetch": "4.1.0",
diff --git a/docs/src/modules/components/AppSearch.js b/docs/src/modules/components/AppSearch.js
index de2b8581173903..81ee9ecfd904c1 100644
--- a/docs/src/modules/components/AppSearch.js
+++ b/docs/src/modules/components/AppSearch.js
@@ -323,7 +323,7 @@ export default function AppSearch(props) {
             initialQuery={initialQuery}
             appId="TZGZ85B9TB"
             apiKey="8177dfb3e2be72b241ffb8c5abafa899"
-            indexName="material-ui"
+            indexName={process.env.SEARCH_INDEX}
             searchParameters={{
               facetFilters: ['version:master', facetFilterLanguage],
               filters,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b065f21cf64d72..6d2ea4b6a6c89f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -511,6 +511,9 @@ importers:
       rimraf:
         specifier: ^6.1.3
         version: 6.1.3
+      semver:
+        specifier: ^7.7.4
+        version: 7.7.4
       styled-components:
         specifier: ^6.3.11
         version: 6.3.12(patch_hash=383c648dfdb5dfc82fbe414d54027d8c982a01c6320370f0ecfdb387e753c09f)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
@@ -584,6 +587,9 @@ importers:
       '@types/react-transition-group':
         specifier: 4.4.12
         version: 4.4.12(@types/react@19.2.14)
+      '@types/semver':
+        specifier: ^7.7.1
+        version: 7.7.1
       '@types/stylis':
         specifier: 4.2.7
         version: 4.2.7
@@ -5604,6 +5610,9 @@ packages:
   '@types/retry@0.12.0':
     resolution: {integrity: sha512-wWKOClTTiizcZhXnPY4wikVAwmdYHp8q6DmC+EJUzAMsycb7HB32Kh9RN4+0gExjmPmZSAQjgURXIGATPegAvA==}
 
+  '@types/semver@7.7.1':
+    resolution: {integrity: sha512-FmgJfu+MOcQ370SD0ev7EI8TlCAfKYU+B4m5T3yXc1CiRN94g/SZPtsCkk506aUDtlMnFZvasDwHHUcZUEaYuA==}
+
   '@types/send@1.2.1':
     resolution: {integrity: sha512-arsCikDvlU99zl1g69TcAB3mzZPpxgw0UQnaHeC1Nwb015xp8bknZv5rIfri9xTOcMuaVgvabfIRA7PSZVuZIQ==}
 
@@ -16869,6 +16878,8 @@ snapshots:
 
   '@types/retry@0.12.0': {}
 
+  '@types/semver@7.7.1': {}
+
   '@types/send@1.2.1':
     dependencies:
       '@types/node': 20.19.37