A big thanks to the 5 contributors who made this release possible.

@mui/material@9.1.2

• [autocomplete] Don't submit forms when committing freeSolo value with Enter key (#48679) @mj12albert
• [transitions] Fix RTG import in ESM (#48645) @mj12albert

@mui/system@9.1.2

• [InitColorSchemeScript] Fix script tag warning in Next.js 16 dev mode (#48671) @siriwatknp

Docs

• Fix typos in release instructions (#48687) @brijeshb42
• Update @mui/x-* packages to latest (#48661) @Janpot

Core

• [code-infra] Convert leaf @mui/system .js+.d.ts pairs to TypeScript (part 1) (#48578) @Janpot
• [code-infra] Bump to latest code-infra packages (#48672) @brijeshb42
• [code-infra] Resolve remaining minimatch advisory (#48662) @Janpot
• [code-infra] Bump nx to resolve minimatch advisory (#48658) @Janpot
• [core] Drop @babel/* pnpm overrides (#48710) @Janpot
• [docs-infra] Revert "Pin StackBlitz demo vite to v7 and plugin-react to v5" (#48709) @Janpot
• [docs-infra] Fix code-block copy button broken on direct page load (#48653) @brijeshb42
• [test] Stabilize Data Grid demo data in Argos screenshots (#48654) @LukasTy

All contributors of this release in alphabetical order: @brijeshb42, @Janpot, @LukasTy, @mj12albert, @siriwatknp

A big thanks to the 9 contributors who made this release possible.

@mui/material@9.1.1

• [Autocomplete] Update fullWidth prop documentation (#48626) @vipin8797
• [ButtonBase] Fix focus ripple lingering after blur (#48650) @siriwatknp
• [InitColorSchemeScript] Server-render in tests for React 19.3 (#48604) @Janpot
• [Transition] Mount child in same commit when opening from unmounted (#48649) @siriwatknp

@mui/styled-engine@9.1.1

• [styled-engine] Prevent enableCssLayer styles from being overridden by unlayered styles (#48603) @Janpot

Docs

• Send SOURCE to Brevo on newsletter subscribe (#48633) @aemartos
• fix TypeScript heading capitalization (#48619) @ifer47
• Remove outdated security section (#48628) @oliviertassinari
• [legal] Update EULA links on website (#48642) @rluzists1

Core

• Update dependencies to resolve Dependabot security alerts (#48641) @Janpot
• [core-docs] Pin StackBlitz demo vite to v7 and plugin-react to v5 (#48643) @Janpot
• [code-infra] Port codebase to use tsgo (#48616) @brijeshb42
• [docs-infra] Fix immutable cache headers for /_next/static assets (#48655) @brijeshb42
• [docs-infra] Run link checker during docs build instead of as separate CI step (#48634) @Janpot
• [docs-infra] Support turbopack for docs (#48569) @brijeshb42
• [test] Cover docs landing-page composites with Argos (#48589) @LukasTy

All contributors of this release in alphabetical order: @aemartos, @brijeshb42, @ifer47, @Janpot, @LukasTy, @oliviertassinari, @rluzists1, @siriwatknp, @vipin8797

A big thanks to the 15 contributors who made this release possible. Here are some highlights ✨:

• ⚙️ Support for the prefers-reduced-motion setting.
• ♿️ Improved support for Windows High Contrast mode with the enhanceHighContrast theme wrapper.

@mui/material@9.1.0

• [autocomplete] Enable clearing highlight when mouse leaves popup (#48354) @mj12albert
• [autocomplete] Fix freeSolo controlled values cleared by initial null (#48611) @mj12albert
• [autocomplete] Fix item removal when it receives focus from VoiceOver before using Backspace (#48572) @silviuaavram
• [autocomplete] Fix resetHighlightOnMouseLeave JSdoc (#48536) @mj12albert
• [autocomplete] Guard against null inputRef during unmount (#48617) @noam3127
• [badge] Add aria-hidden to badge content and polish docs demos (#48471) @mj12albert
• [badge] Use inline CSS variables for anchorOrigin/overlap positioning (#48549) @siriwatknp
• [button] Fix customized flex gap styles (#48542) @mj12albert
• [dialog] Fix unwanted DialogPaper focus ring (#48535) @mj12albert
• [focus trap] Fix incorrect tab order when tabIndex >= 1 (#48546) @mj12albert
• [progress] Show runtime errors only once (#48591) @silviuaavram
• [select] Allow spacebar to select elements (#48615) @silviuaavram
• [select] Support typeahead when closed (#48563) @mj12albert
• [step button] Choose higher contrast ripple color for dark mode focus (#48612) @silviuaavram
• [stepper] Include StepConnector inside Step element (#48492) @silviuaavram
• [stepper] Proper support for vertical alternativeLabel (#48485) @silviuaavram
• [tabs] Fix React 18 roving tabindex and dedupe invalid-value warning (#48605) @Janpot
• [theme] Add HighContrast theme enhancer (#48319) @silviuaavram
• [timeline item] Fix extra ::before spacing when TimelineOppositeContent is present (#46663) @tyalau
• [tooltip] Prevent stuck-open tooltip when child becomes disabled (#48606) @Janpot
• [transitions] Custom Transition component (#48325) @mj12albert
• [transitions] Support prefers-reduced-motion (#48357) @mj12albert

@mui/utils@9.1.0

• [utils] Prevent prototype pollution in fastDeepAssign (#48580) @Janpot

Docs

• [docs] Add function slotProps documentation (#48574) @mj12albert
• [docs] Clarify styled-components version compatibility (#48533) @nightt5879
• [docs] Fix broken URLs (#48520) @oliviertassinari
• [docs] Fix invalid JSON in Zed MCP setup example (#48490) @pavan-sh
• [docs] Mention release version for enhanceHighContrast (#48609) @silviuaavram
• [docs] Remove outdated MUI X v8 notification (#48600) @cherniavskii
• [docs] Remove redundant enhanceHighContrast information (#48632) @silviuaavram
• [docs-infra] Decrease loaded bundle size on docs (#48584) @brijeshb42
• [docs-infra] Drop multi-locale plumbing from API pages (#48370) @brijeshb42
• [docs-infra] Fix Cookie banner heading (#48529) @oliviertassinari
• [docs-infra] Infinitely cache all static assets (#48627) @brijeshb42
• [docs-infra] Remove outdated noSEOadvantage entries (#48527) @oliviertassinari
• [docs-infra] Restore build-only invariant throws via NEXT_RUNTIME guard (#48475) @Janpot
• [docs-infra] Test HTML validation in broken links checker (#48088) @Janpot
• [docs][icons] Fix Font Awesome Chip demo in dark mode (#48576) @siriwatknp
• [docs][icons] Remove redundant font awesome demo (#48493) @ZeeshanTamboli
• [docs][modal] Add nested modal guidance (#46507) @JakeSaterlay
• [docs][stepper] Fix focus management in examples (#48494) @silviuaavram

Core

• Eslint markdown (#48371) @Janpot
• [agents] Fix some docs links (#48561) @silviuaavram
• [blog] Copy editing improvement on v9 announcement blog posts (#48543) @joserodolfofreitas
• [code-infra] Cleanup unused jss packages (#48590) @brijeshb42
• [code-infra] Collapse canary workflows into nightly and nightly-cron (#48556) @Janpot
• [code-infra] Convert @mui/private-theming to TypeScript (#48565) @Janpot
• [code-infra] Convert @mui/styled-engine to TypeScript (#48544) @Janpot
• [code-infra] Convert @mui/styled-engine-sc to TypeScript (#48577) @Janpot
• [code-infra] Fix duplicate resource_class in test_regressions CI job (#48601) @LukasTy
• [code-infra] Make @mui/internal-docs-utils compatible with TypeScript 6 (#48594) @Janpot
• [code-infra] Migrate CircleCI jobs to Gen2 resource classes (#48593) @LukasTy
• [code-infra] Parallelize visual regression screenshots (#48557) @Janpot
• [code-infra] Run nightly-cron on v7.x (#48579) @Janpot
• [core] Fix typescript@next typecheck (#48587) @Janpot
• [pnpm] Add security settings to pnpm-workspace.yaml (#48582) @Janpot
• [styled-engine-sc] Fix compatibility with Vite and Vitest (#48558) @mj12albert
• [test] Add axe-core tests for mui-material (#48341) @siriwatknp
• [test] Configure Tailwind CSS in the visual-regression app (#48575) @Janpot

All contributors of this release in alphabetical order: @brijeshb42, @cherniavskii, @JakeSaterlay, @Janpot, @joserodolfofreitas, @LukasTy, @mj12albert, @nightt5879, @noam3127, @oliviertassinari, @pavan-sh, @silviuaavram, @siriwatknp, @tyalau, @ZeeshanTamboli

A big thanks to the 25 contributors who made this release possible.

@mui/material@9.0.1

• [accessibility] HighContrast mode on Avatar, Badge, Slider and Switch (#48320) @silviuaavram
• [autocomplete] Fix highlight sync and scroll preservation (#48322) @mj12albert
• [autocomplete] Fix input value and clear (#48263) @mj12albert
• [autocomplete] Fix iOS group scrollbar overflow (#48400) @oliviertassinari
• [autocomplete] Fix popper rendering issues (#48327) @mj12albert
• [autocomplete] Improve highlight tracking and selection state (#48219) @mj12albert
• [button] Fix startIcon alignment (#48332) @mj12albert
• [button][button base] Document type attribute (#48146) @mj12albert
• [button][fab][menu item][list item button] Remove duplicated className entries (#48213) @silviuaavram
• [checkbox] Set aria-checked=mixed when indeterminate (#48147) @mj12albert
• [circularprogress][linearprogress] Improve accessibility (#48172) @silviuaavram
• [dialog][drawer][focus trap] Fix initial focus target (#48280) @mj12albert
• [drawer] Fix swipe close flicker (#48372) @mj12albert
• [drawer] Fix transition jump (#48308) @mj12albert
• [focus trap] Remove IE 11-specific focus safety check from FocusTrap cleanup (#48368) @ZeeshanTamboli
• [form controls] Add internal useFormControlState hook (#48344) @mj12albert
• [icon button] Remove unused color palette mapping in styles (#48353) @sai6855
• [icons] Revert to using wildcard export paths (#48381) @brijeshb42
• [input] Fix layout shift with display: flex (#43839) @oliviertassinari
• [input] Prevent notched prop leaking into DOM (#48281) @mj12albert
• [input base] Place aria-label on the input element (#48283) @silviuaavram
• [inputs] Fix autofocus in SSR environment (#48290) @mj12albert
• [List] Fix sticky subheader overlapping iOS scrollbar (#48375) @sandeshdamkondwar
• [popper] Persist positioning styles when popperOptions changes reference (#48121) @mj12albert
• [select] Stop using combobox element for labeling (#48251) @silviuaavram
• [select] Support single-pointer-cycle selection and pointer cancellation (#48328) @mj12albert
• [switch] Fix incorrect role with slotProps.input (#48469) @mj12albert
• [tabs] Fix scrollable tabs blocking pointer events (#48166) @mj12albert
• [textfield] Fix autofill styles always in dark mode when CSS variables is used (#48244) @ZeeshanTamboli
• [tooltip] Simplify RTL styles using CSS logical properties (#48351) @sai6855
• [tooltip] Close Tooltip when its child becomes disabled (#44507) @chudesno
• [typography] Fix h4 variant when using responsiveFontSizes() (#48314) @mj12albert
• [useMediaQuery] Fix crash in Firefox extension (#45196) @Mr-Quin

@mui/system@9.0.1

• [system] Fix theme mutation when using responsive typography shorthand in sx (#48266) @tomups

@mui/codemod@9.0.1

• [codemod] Add --jsx option to v9.0.0/system-props codemod (#48315) @siriwatknp
• [codemod] Add packageName support to the v9 system props codemod (#48253) @franco-dias

@mui/utils@9.0.1

• [utils] Add shadow dom utils (#48256) @mj12albert
• [utils] Fix resolveProps receiving empty string className (#48289) @SAY-5
• [utils] Remove unnecessary excludeKeys from extractEventHandlers (#48481) @ZeeshanTamboli

Docs

• [docs][autocomplete] Add demo with Tanstack Query useInfiniteQuery (#48356) @mj12albert
• [docs] Add agent skills for styling, theming, Next.js, and Tailwind CSS integrations (#48187) @mapache-salvaje
• [docs] Cleanup @mui/base (#48278) @mj12albert
• [docs] Fix create-playground script (#48380) @imazizbohra
• [docs] Fix date range calendar demo after MUI X v9 update (#48262) @LukasTy
• [docs] Fix icon search modal (#48255) @mj12albert
• [docs] Fix Material UI and MUI system "Upgrade to v9" docs (#48245) @ZeeshanTamboli
• [docs] Fix Popover JSdoc (#48310) @nitzan-treg
• [docs] Fix RTL toggle highlight in docs settings drawer (#48476) @sai6855
• [docs] Fix typos (#48155) @ayushshukla1807
• [docs] Fix typos (#48270) @pavan-sh
• [docs] Fix versions page (#48261) @mnajdova
• [docs] Fix vision grammar (#48477) @pavan-sh
• [docs] Improve accessibility for select examples (#48250) @silviuaavram
• [docs] Improve CSP guide with required directives (#48258) @Janpot
• [docs] Link to agent skills in relevant docs (#48387) @mapache-salvaje
• [docs] Make NumberField described by helper text (#48257) @silviuaavram
• [docs] Remove esm.sh references and endorsement (#44649) (#48330) @starboyvarun
• [docs] Remove generated CSS utility component doc (#48383) @mj12albert
• [docs] Remove incorrect message from experiments page and hide /experiments from crawlers (#48297) @ZeeshanTamboli
• [docs] Remove outdated references of .ttf and .woff (#48399) @oliviertassinari
• [docs] Restore wider maxWidth for disableToc pages (#48260) @LukasTy
• [docs] Show v9 announcement banner (#48242) @mnajdova
• [docs] Sync team members from frontend-public endpoint (#48273) @Janpot
• [docs] Update AGENTS.md testing section (#48392) @mj12albert
• [docs] Update e2e test README and test error message (#48285) @ZeeshanTamboli
• [docs] Update menu examples to always have aria-expanded (#48211) @silviuaavram
• [docs] Update MUI Treasury links (#47760) @siriwatknp
• [docs] Update MUI X dependencies to v9.0.0 (#48231) @siriwatknp
• [docs] Update MUI X roadmap section (#48316) @siriwatknp
• [docs] Update WCAG links and version from 2.1 to 2.2 (#48379) @mj12albert
• [docs] Use React.useId() for demo IDs (#48300) @Janpot

Core

• [blog] Introducing Material UI and MUI X v9 (#48157) @joserodolfofreitas
• [code-infra] bundle size check internal core docs (#48390) @Janpot
• [code-infra] Deduplicate vale script (#48385) @brijeshb42
• [code-infra] Fix type shadowing (#48389) @Janpot
• [code-infra] Migrate to vite from webpack for e2e tests (#48248) @brijeshb42
• [code-infra] Remove a few ts-ignore comments (#43265) @Janpot
• [code-infra] Remove no longer needed eslint-import-resolver-webpack package (#48207) @ZeeshanTamboli
• [code-infra] Remove references to @mui/base and @mui/joy (#48358) @brijeshb42
• [code-infra] Use vale rules from code-infra package (#48173) @brijeshb42
• [core] Remove next.mui.com links (#48240) @mnajdova
• [core-docs] Use type-only imports for type-only references (#48386) @JCQuintas
• [docs-infra] Add x-chat to MuiProductId type and product switcher (#48209) @hasdfa
• [docs-infra] Fix duplicate JSDoc in proptypes generation (#48304) @brijeshb42
• [docs-infra] Fix duplicate JSDoc in proptypes generation for merged declarations (#48296) @brijeshb42
• [docs-infra] Fix import of cjs react-simple-code-editor in esm (#48349) @brijeshb42
• [docs-infra] Fix tab index on Base UI tab (#48345) @brijeshb42
• [docs-infra] Migrate docs app container/frame components (#48182) @brijeshb42
• [docs-infra] Migrate MarkdownDocs component to docs package (#48227) @brijeshb42
• [docs-infra] Re-apply changes from previous revert (#48243) @brijeshb42
• [docs-infra] Remove infra around the i18n setup (#48360) @brijeshb42
• [docs-infra] Rename package to @mui/internal-api-docs-builder (#48230) @brijeshb42
• [docs-infra] Revert JSDoc in proptypes generation for merged declarations (#48301) @brijeshb42
• [docs-infra] Revert Migrate docs app container/frame components (#48239) @brijeshb42
• [docs-infra] Revert Migrate MarkdownDocs component to docs package (#48238) @brijeshb42
• [internal] Add missing #host-reference (#48226) @silviuaavram
• [internal] Move changelog and update security page for post v9 release (#48298) @siriwatknp
• [internal] Remove outdated .woff files (#48398) @oliviertassinari
• [test] Fix autocomplete test description (#48395) @ZeeshanTamboli

All contributors of this release in alphabetical order: @ayushshukla1807, @brijeshb42, @chudesno, @franco-dias, @hasdfa, @imazizbohra, @Janpot, @JCQuintas, @joserodolfofreitas, @LukasTy, @mapache-salvaje, @mj12albert, @mnajdova, @Mr-Quin, @nitzan-treg, @oliviertassinari, @pavan-sh, @sai6855, @sandeshdamkondwar, @SAY-5, @silviuaavram, @siriwatknp, @starboyvarun, @tomups, @ZeeshanTamboli

A big thanks to the 5 contributors who made this release possible.

@mui/material@7.3.11

• [autocomplete] Fix highlight sync and scroll preservation (#48350) @mj12albert
• [autocomplete] Fix popper rendering issues (#48343) @mj12albert
• [autocomplete] Improve highlight tracking and selection state (#48318) @mj12albert
• [button] Fix startIcon alignment (#48339) @mj12albert
• [button] Remove duplicated className entries (#48284) @silviuaavram
• [checkbox] Set aria-checked=mixed when indeterminate (#48286) @mj12albert
• [dialog][drawer][focus trap] Fix initial focus target (#48324) @mj12albert
• [drawer] Fix transition jump (#48340) @mj12albert
• [input] Fix layout shift with display: flex (#48359) @oliviertassinari
• [inputs] Fix autofocus in SSR environment (#48307) @mj12albert
• [popper] Persist positioning styles when popperOptions changes reference (#48302) @mj12albert
• [switch] Fix incorrect role with slotProps.input (#48472) @mj12albert
• [utils] Add shadow dom utils (#48309) @mj12albert

Docs

• [docs] Update banner to announce v9 (#48299) @siriwatknp
• [docs] Add v9 in the versions select in v7.mui.com (#48233) @alexfauquette

Core

• [internal] Update some host-reference entries (#48225) @silviuaavram

All contributors of this release in alphabetical order: @alexfauquette, @mj12albert, @oliviertassinari, @silviuaavram, @siriwatknp

A big thanks to the 15 contributors who made this release possible. A few highlights ✨:

• 📖 Added the Menubar component page to the docs.

@mui/material@7.3.10

• [alert][dialog] Accessibility improvements (#48161) @silviuaavram
• [autocomplete] Add root slot (#47916) @GerardasB
• [autocomplete] Fix helper text focusing input when clicked (#48162) @mj12albert
• [autocomplete] Fix popup reopening on window focus regain with openOnFocus (#47914) @aman44444
• [autocomplete] Optimize selected option lookup (#48027) @anchmelev
• [autocomplete] Support full slots for clearIndicator and popupIndicator (#47913) @silviuaavram
• [button-base] Fix native button detection (#47994) @mj12albert
• [input] Fix high contrast cutoff on first character (#48160) @silviuaavram
• [list item text][card header] Revert cleanup of duplicated CSS rules (#47938) @sai6855
• [popper] Add missing classes export (#48033) @mj12albert
• [select] Fix focus visible always set on menu item (#48022) @silviuaavram
• [slider] Accept readonly array for the value prop (#47961) @pcorpet
• [switch] Add border to make it visible in high contrast mode (#48210) @silviuaavram
• [theme] Do not create channel tokens for custom colors when nativeColor is used (#48144) @ZeeshanTamboli
• [transitions] Performance improvements & misc fixes (#48217) @mj12albert

Docs

• [codemod] Add v7 migration docs for deprecated Autocomplete APIs and Autocomplete codemod (#47954) @ZeeshanTamboli
• [menubar] Add Menubar component page (#47942) @siriwatknp
• [progress] Label all demo components (#48168) @mj12albert
• [system] Update styled API docs for easier understanding (#47969) @olivier-lxo
• Fix the dark mode footer row shadow for the Data Grid on the advanced components page (#48152) @arminmeh
• Fix MUI X redirects (#47917) @cherniavskii
• Use direct palette vars in Tailwind v4 snippet (#47955) @Ahmad-Alaziz

Core

• [blog] Blogpost for upcoming price changes for MUI X (#47820) @DanailH
• [blog] Update the 2026 price changes blogpost (#47944) @DanailH
• [code-infra] Add pkg-pr-new as dev dependency (#48023) @silviuaavram
• [docs-infra] Update Release Instructions and Search Index v7 (#48109) @dav-is

All contributors of this release in alphabetical order: @Ahmad-Alaziz, @aman44444, @anchmelev, @arminmeh, @cherniavskii, @DanailH, @dav-is, @GerardasB, @mj12albert, @olivier-lxo, @pcorpet, @sai6855, @silviuaavram, @siriwatknp, @ZeeshanTamboli

🥳 We're excited to announce the stable release of Material UI v9.0! This major release focuses on accessibility improvements, sx prop performance, and cleanup of deprecated APIs. See the Material UI v9.0 announcement blog posts for more details. Also see the MUI v9 announcement blog posts for the broad ecosystem updates.

Check out the upgrade guide to see how you can move to this version.

@mui/material@9.0.0

• [slider] Use pointer events instead of mouse events (#48164) @mj12albert
• [switch] Add border to make it visible in high contrast mode (#48180) @silviuaavram
• [transitions] Performance improvements & misc fixes (#48151) @mj12albert
• Remove unnecessary overridesResolvers from styled components (#48204) @sai6855

Core

• [code-infra] Setup workflow to publish internal packages (#47952) @brijeshb42
• [core-docs] Add x-scheduler to MuiProductId type (#48185) @rita-codes
• [docs-infra] Add scheduler to product switcher (#48208) @rita-codes
• [internal] Prepare libraries for v9 stable release (#48206) @siriwatknp

🙇‍♂️ We'd like to extend a big thank you to everyone involved who made this major release possible.

A big thanks to the 11 contributors who made this release possible.

@mui/material@9.0.0-beta.1

Breaking Changes

• [grid] Remove 'column' and 'column-reverse' options from direction prop (#47564) @sai6855
• [icons] Remove legacy *Outline icons (#48116) @mj12albert
• [list-item-icon] Use theme spacing instead of hardcoded minWidth (#46597) @adiitxa

Changes

• [all components] Fix slotProps.transition types (#48153) @mj12albert
• [alert][dialog] Accessibility improvements (#48113) @silviuaavram
• [autocomplete] Fix helper text focusing input when clicked (#48156) @mj12albert
• [buttonbase] Add nativeButton prop (#47989) @mj12albert
• [input] Fix high contrast cutoff on first character (#48150) @silviuaavram
• [menu] Fix empty roving focus container (#48114) @mj12albert
• [utils] Explicitly register roving tab items with parent (#48122) @mj12albert

Docs

• Fix HTML validation errors (#48107) @Janpot
• Fix duplicate IDs and HTML validation issues (#48095) @Janpot
• Fix the dark mode footer row shadow for the Data Grid on the advanced components page (#48149) @arminmeh
• Improve jsdom section (#48098) @oliviertassinari
• Update "Deprecated APIs removed" section to h2 in "Upgrade to v9" docs (#48115) @ZeeshanTamboli
• [progress] Label all demo components (#48143) @mj12albert
• [docs-infra] Add x-scheduler to component API URL resolver (#48097) @rita-codes
• [docs-infra] Resolve some redirects (#48165) @Janpot
• [docs-infra] Update v9 Search Index (#48028) @dav-is

Core

• [code-infra] Discover exports for bundle size report (#48170) @Janpot
• [internal] Fix use of ellipsis (#48096) @oliviertassinari
• [test] Add screenshot test for Virtualized Table (#47947) @mnajdova
• [test] Remove componentsProp from describeConformance tests (#48142) @ZeeshanTamboli
• [theme] Do not create channel tokens for custom colors when nativeColor is used (#47765) @ZeeshanTamboli

All contributors of this release in alphabetical order: @adiitxa, @arminmeh, @dav-is, @Janpot, @mj12albert, @mnajdova, @oliviertassinari, @rita-codes, @sai6855, @silviuaavram, @ZeeshanTamboli

A big thanks to the 8 contributors who made this release possible.

@mui/material@9.0.0-beta.0

Breaking Changes

• [linear-progress] Remove deprecated CSS classes (#48068) @mj12albert
• [list-item, list-item-text] Remove deprecated props (#48042) @siriwatknp
• [button-group] Remove deprecated classes (#48043) @siriwatknp
• [card] Remove deprecated CardHeader props (#47995) @silviuaavram
• [checkbox][radio][switch] Remove deprecated inputProps and inputRef (#48059) @siriwatknp
• [chip] Remove deprecated classes (#48046) @silviuaavram
• [dialog][modal][drawer][swipeabledrawer] Remove deprecated props and classes (#48039) @silviuaavram
• [divider] Remove deprecated CSS classes (#48075) @siriwatknp
• [drawer] Remove deprecated CSS classes (#48077) @siriwatknp
• [image-list-item-bar] Remove deprecated CSS classes (#48064) @siriwatknp
• [inputs] Remove deprecated props & classes (#48071) @mj12albert
• [material-ui] Remove unnecessary overridesResolvers from styled components (#48082) @ZeeshanTamboli
• [material-ui][system] Remove deprecated system props from Box, Stack, Typography (#48072) @siriwatknp
• [pagination-item] Remove deprecated CSS classes (#48076) @siriwatknp
• [pagination-item] Remove deprecated props (#48038) @siriwatknp
• [rating] Remove deprecated IconContainerComponent (#48019) @siriwatknp
• [select] Remove deprecated CSS classes (#48065) @mj12albert
• [slider] Remove deprecated CSS classes (#48074) @siriwatknp
• [step-connector][step-content][step-label] Remove deprecated props and classes (#48058) @siriwatknp
• [tabs][tab] Remove deprecated CSS classes (#48078) @siriwatknp
• [table-pagination][table-sort-label] Remove deprecated props and classes (#48060) @siriwatknp
• [toggle-button-group] Remove deprecated classes (#48061) @siriwatknp

Changes

• [system] Improve performance when using sx prop (#44254) @romgrk

@mui/codemod@9.0.0-beta.0

• [codemod] Add missing codemod links in upgrade guide (#48069) @silviuaavram

Docs

• Mention all breaking changes in changelog (#48091) @silviuaavram
• Fix link to upgrade-to-v9 docs in release CHANGELOG (#48081) @ZeeshanTamboli

Core

• Update browserslistrc (#48085) @silviuaavram
• [code-infra] Prevent major version updates of bundler/framework packages in bundling fixtures (#48062) @Copilot
• [code-infra][icons-material] Avoid material utils barrel in createSvgIcon (#48029) @anchmelev
• [docs-infra] Migrate more leaf components to mui-docs (#48018) @brijeshb42

All contributors of this release in alphabetical order: @anchmelev, @brijeshb42, @Copilot, @mj12albert, @romgrk, @silviuaavram, @siriwatknp, @ZeeshanTamboli

A big thanks to the 11 contributors who made this release possible.

@mui/material@9.0.0-alpha.4

Breaking Changes

• [accordion] Remove deprecated props (#47963) @silviuaavram
  • TransitionComponent
  • TransitionProps
• [accordionsummary] Remove deprecated CSS class (#48006) @silviuaavram
  • contentGutters
• [alert] Remove deprecated CSS classes (#48011) @silviuaavram
  • standardSuccess
  • standardInfo
  • standardWarning
  • standardError
  • outlinedSuccess
  • outlinedInfo
  • outlinedWarning
  • outlinedError
  • filledSuccess
  • filledInfo
  • filledWarning
  • filledError
• [alert] Remove deprecated props (#47965) @silviuaavram
  • components
  • componentsProps
• [autocomplete] Remove deprecated props (#47864) @ZeeshanTamboli
  • ChipProps
  • componentsProps
  • ListboxComponent
  • ListboxProps
  • PaperComponent
  • PopperComponent
  • renderTags
• [avatar] Remove deprecated props (#47966) @silviuaavram
  • imgProps
• [avatargroup] Remove deprecated props (#47968) @silviuaavram
  • componentsProps
• [backdrop] Remove deprecated props (#47991) @silviuaavram
  • components
  • componentsProps
  • TransitionComponent
• [badge] Remove deprecated props (#47993) @silviuaavram
  • components
  • componentsProps
• [button] Remove deprecated CSS classes (#48012) @silviuaavram
  • Color variant classes: textInherit, outlinedPrimary, containedSecondary, etc.
  • Size classes: textSizeSmall, iconSizeMedium, etc.
• [circularprogress] Remove deprecated CSS classes (#48014) @silviuaavram
  • circleDeterminate
  • circleIndeterminate
• [divider] Remove deprecated prop (#48013) @atharva3333
  • light
• [formcontrollabel] Remove deprecated props (#48032) @atharva3333
  • componentsProps
• [menu] Remove deprecated props (#48021) @siriwatknp
  • MenuListProps
  • PaperProps
  • TransitionProps
• [mobilestepper] Remove deprecated props (#48041) @siriwatknp
  • LinearProgressProps
• [popover] Remove deprecated props (#48021) @siriwatknp
  • BackdropComponent
  • BackdropProps
  • PaperProps
  • TransitionComponent
  • TransitionProps
• [popper] Remove deprecated props (#48020) @siriwatknp
  • components
  • componentsProps
• [select] Remove deprecated props passed via MenuProps (#48021) @siriwatknp
  • MenuListProps
  • PaperProps
  • TransitionProps
• [slider] Remove deprecated props (#47996) @siriwatknp
  • components
  • componentsProps
• [speeddial] Remove deprecated props (#47998) @siriwatknp
  • TransitionComponent
  • TransitionProps
• [speeddialaction] Remove deprecated props (#47998) @siriwatknp
  • FabProps
  • tooltipTitle
  • tooltipPlacement
  • tooltipOpen
  • TooltipClasses
• [tabs] Remove deprecated props (#48017) @siriwatknp
  • ScrollButtonComponent
  • TabIndicatorProps
  • TabScrollButtonProps
  • slots.StartScrollButtonIcon
  • slots.EndScrollButtonIcon
• [textfield] Remove deprecated props (#47878) @ZeeshanTamboli
  • InputProps
  • inputProps
  • SelectProps
  • InputLabelProps
  • FormHelperTextProps
• [tooltip] Remove deprecated props (#47988) @siriwatknp
  • components
  • componentsProps
  • PopperComponent
  • PopperProps
  • TransitionComponent
  • TransitionProps
• [typography] Remove deprecated prop (#47986) @siriwatknp
  • paragraph
• [buttonbase] Key handlers should not run on a disabled non-native button (#48003) @mj12albert
• [tablepagination] Format pagination numbers according to locale (#47803) @siriwatknp
• [textfield] Use non-native label for <TextField select/> (#47958) @mj12albert

Check out the v9 upgrade guide.

Changes

• [autocomplete] Optimize selected option lookup (#47953) @anchmelev
• [buttonbase] Fix native button detection (#47985) @mj12albert
• [inputbase] Fix test using removed InputProps on TextField (#48000) @siriwatknp
• [popper] Add missing classes export (#48031) @mj12albert
• [select] Fix focus visible always set on menu item (#47912) @silviuaavram
• [slider] Fix focus visible styles incorrectly applied by pointer (#47894) @mj12albert
• [slider] Accept readonly array for the value prop (#47936) @pcorpet

@mui/codemod@9.0.0-alpha.4

• [codemod] Add slot key rename to tabs-props codemod and add to README (#48035) @siriwatknp
• [codemod] Add card-header-props migration guide (#48005) @siriwatknp

Docs

• [blog] Lowercase 2026-MUI-X-price-changes blog post URL (#47871) @Janpot
• [docs] Wide docs layout (#47950) @noraleonte
• [docs] Mention the list of props removed in upgrade guide (#48010) @silviuaavram
• [docs] Update Autocomplete deprecated props removal migration guide docs (#47990) @ZeeshanTamboli
• [docs-infra] Extract shared App component from _app into @mui/docs (#47933) @brijeshb42
• [docs-infra] Expose global theme object (#47964) @Janpot
• [docs][system] Update styled API docs for easier understanding (#47957) @olivier-lxo

Core

• [code-infra] Add pkg-pr-new as dev dependency (#47992) @Janpot
• [code-infra] Remove CI coverage collection and upload to Codecov (#47930) @Janpot
• [core] Migrate to ESLint 10 (#47872) @brijeshb42
• [core] Remove GridLegacy component (#47956) @siriwatknp

All contributors of this release in alphabetical order: @anchmelev, @atharva3333, @brijeshb42, @Janpot, @mj12albert, @noraleonte, @olivier-lxo, @pcorpet, @silviuaavram, @siriwatknp, @ZeeshanTamboli