Release notes

This page lists highlights, bug fixes, and known issues for the latest release of Streamlit. If you're looking for information about nightly releases or experimental features, see Pre-release features.

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Version 1.67.0 (latest)

Release date: November 5, 2026

Highlights

  • 🔲 Introducing st.grid, a responsive grid container for repeated tiles like metric cards, galleries, and dashboard cards that reflow with the available width (#17800, #11101).
  • 🤖 Announcing agent-accessible apps! When you turn on the experimental server.enableAgentApi option, AI agents and other programs can use your app over HTTP or through an MCP endpoint that you can add to clients like Claude, ChatGPT, Cursor, and VS Code (#17731, #17510).
  • 🎨 Introducing a refreshed default theme! The built-in light and dark themes have a warmer palette, updated colors, and widget and sidebar borders shown by default, and st.map markers use your theme's primary color (#17450, #17467, #17495, #17493).

Notable Changes

  • 💾 You can limit the memory used by st.cache_data with its new max_size parameter for each function, or across all functions with the new server.maxCacheDataSize configuration option (#17552, #17553, #2911).
  • 🚩 The following widgets have a new required parameter to prevent users from committing or submitting an empty value:
  • 📐 st.dialog accepts a pixel width, so you can size a dialog to fit fixed-width content. Invalid width values now raise an error instead of falling back to the small dialog (#17412).
  • 🧭 st.Page has a help parameter to describe each page in a navigation tooltip, which st.page_link also uses by default (#17807).
  • 🪄 st.selectbox has an icon parameter to show an emoji or Material icon at the start of the field, like st.text_input (#17850, #17840).
  • 📊 st.echarts_chart has new selection and data features:
    • Set on_select to return the point and brush selections that you enable in the chart's spec (#16786).
    • Dataframes in dataset.source are sent as Arrow, which makes large charts faster and displays values the same way as st.dataframe (#17678).
    • Dataframe-backed charts have a "Show data" toolbar action that displays the chart's data as a table (#17708).
  • ⚡ st.altair_chart and st.vega_lite_chart send selections as soon as a click or brush gesture ends, so selection reruns are faster and a form submitted right after includes the latest selection (#17666).
  • 🔧 You can set a server-wide default TTL for st.connection with the new runner.connectionDefaultTTL configuration option (#17248).

Other Changes

  • 📚 The bundled developing-with-streamlit agent skill has improved guidance on theming and CSS, Session State, testing with AppTest, dynamic containers, and performance (#17473, #17483, #17496, #17605, #17674, #17675, #17724).
  • 📈 The docstrings for st.pyplot, st.plotly_chart, and st.echarts_chart and the bundled agent skill recommend Vega-based charts or st.echarts_chart with a dataframe source for new charts. st.echarts_chart also raises an error for unsupported ECharts GL map components instead of rendering a blank chart (#17769, #17810).
  • 🔢 st.echarts_chart tooltips accept st.metric number formats in tooltip.valueFormatter, so you can format tooltip values without JavaScript (#17755).
  • 🧪 AppTest supports st.data_editor, file uploads in st.chat_input, and setting st.user and st.context for a test (#17476, #17464, #17611).
  • 🔣 Type checkers infer a fixed-length tuple from st.columns when you pass an integer from 1 to 6 or a tuple of up to six widths, so a mismatched unpack is caught before the app runs (#17498, #17506).
  • 🚀 Charts, st.metric, and st.dataframe load faster because the "Show data" grid and Vega are downloaded only when needed (#17846, #17853).
  • ⏩ The Material Symbols icon font starts loading at app startup, so icons appear sooner on first load (#17849, #17839).
  • 📝 Corrected outdated docstrings and configuration help text, including for client.toolbarMode (#17613).
  • 🐛 Bug fix: st.echarts_chart has better default layouts for titles with top legends, treemaps, and horizontal markLine labels (#17885).
  • 🦋 Bug fix: Default tooltips in st.echarts_chart label each field and format dates when the chart's data is a dataframe in dataset.source (#17883).
  • 🪲 Bug fix: The page keeps scrolling when the mouse wheel passes over an st.echarts_chart that zooms or pans with the wheel, such as a default treemap, until the pointer rests on the chart (#17882, #17507).
  • 🐜 Bug fix: When an st.echarts_chart spec can't be serialized, the error names the offending value and how to convert it (#17881).
  • 🐝 Bug fix: The agent API matches browser behavior more closely and has more accurate snapshots, clearer error messages, and better MCP tool descriptions (#17870, #17871, #17872, #17880).
  • 🐞 Bug fix: height="stretch" dataframes and data editors fall back to their default height when no parent sets one, and they stay inside their parent while you resize them (#17879, #17662).
  • 🕷️ Bug fix: Dataframes and chart "Show data" tables no longer have extra space below them (#17864).
  • 🪳 Bug fix: st.echarts_chart hides overlapping labels on time, value, and log axes by default (#17858).
  • 🪰 Bug fix: snowflake-callers-rights connections use the container's protocol and port settings and no longer require a default database and schema (#17848, #17820).
  • 🦠 Bug fix: The range calendar in st.date_input no longer loses or double-commits the first date you pick (#17833).
  • 🦟 Bug fix: Element calls no longer rewrite shared method attributes, which serialized concurrent script threads on free-threaded Python (#17823, #17801).
  • 🦂 Bug fix: Widgets don't rerun the app when an interaction leaves their value unchanged, like closing st.multiselect without changing it (#17822).
  • 🦗 Bug fix: Keyed elements stay mounted when a rerun inserts content above them, so they keep their state, focus, and in-progress input (#17804).
  • 🕸️ Bug fix: The global Streamlit meta-skill reliably finds a project's bundled agent skill on Windows, macOS, and Linux without creating or syncing Python environments (#17803).
  • 🐌 Bug fix: Installing the bundled agent skills from the in-app prompt no longer fails when the server's console can't print the install summary, which mostly affected Windows (#17802).
  • 🦎 Bug fix: Streamlit replaces pandas inplace= calls that pandas 3.1 deprecates, so st.data_editor row deletion and charts keep working on pandas 4 (#17795).
  • 🦀 Bug fix: st.vega_lite_chart redraws when new data has the same shape as the old data, and Altair and built-in charts update their data in place instead of rebuilding the view (#17793).
  • 👽 Bug fix: st.dataframe and st.data_editor with a fixed height expand to show more rows in fullscreen (#17791, #17771).
  • 🐛 Bug fix: st.echarts_chart and Vega-based charts use faster rendering defaults for very large datasets, so they no longer stall the browser (#17788).
  • 🦋 Bug fix: Time axes in st.echarts_chart show midnight values as dates instead of with a 00:00:00 time (#17781).
  • 🪲 Bug fix: st.echarts_chart logs chart errors to the browser console and can render again after an option fails (#17780).
  • 🐜 Bug fix: st.metric sparklines and the dataframe column statistics menu no longer log a Vega-Lite version warning in the browser console (#17778).
  • 🐝 Bug fix: Muted text, like placeholders and file uploader hints, meets WCAG AA contrast in the default light theme (#17766, #8289, #8249, #8276, #8288, #16149).
  • 🐞 Bug fix: Dollar amounts in Markdown, like $315K of $1.46M, render as plain text instead of being parsed as math (#17753).
  • 🕷️ Bug fix: st.echarts_chart default colors are readable in dark mode. Candlestick charts also use green for rising and red for falling, matching st.plotly_chart (#17750).
  • 🪳 Bug fix: Altair and Vega-Lite charts restore their interval brush rectangle after remounting or switching to fullscreen (#17744).
  • 🪰 Bug fix: Element toolbars, like the one on st.dataframe, appear above an overlapping st.segmented_control option and stay clickable (#17734).
  • 🦠 Bug fix: Printed apps follow the on-screen layout without charts, cards, metrics, or the sidebar overlapping or getting clipped (#17727).
  • 🦟 Bug fix: st.pydeck_chart resets its camera when a rerun changes the chart's views, such as from a map view to a globe view (#17701).
  • 🦂 Bug fix: Errors and docs for @st.fragment(parallel=True) no longer suggest writing to outside containers, which parallel fragments don't support (#17688, #17612).
  • 🦗 Bug fix: When script runs overlap, the frontend applies each run's completion to the run that finished, so stale elements are cleaned up correctly and st.chat_input and st.text_input re-enable at the right time (#17686).
  • 🕸️ Bug fix: st.dataframe, st.table, and st.data_editor correctly display decimals, periods, intervals, categoricals, and other Arrow types (#17684, #5864).
  • 🐌 Bug fix: st.plotly_chart(theme=None) no longer applies the app's theme fonts and backgrounds, so light figures stay readable in dark mode (#17671, #17665).
  • 🦎 Bug fix: Custom themes that don't set textColor no longer log an invalid sidebar color warning in the browser console (#17669, #17638).
  • 🦀 Bug fix: When two pages in st.navigation resolve to the same URL pathname, the error names both pages (#17646).
  • 👽 Bug fix: st.feedback supports the persist_state and bind parameters like other input widgets (#17621).
  • 🐛 Bug fix: A snowflake-callers-rights connection raises an error if it's used from a session other than the one that created it, so queries can't run with another user's identity (#17584).
  • 🦋 Bug fix: st.audio_input in the sidebar no longer shows an error after a successful recording (#17583, #17585).
  • 🪲 Bug fix: Help tooltips no longer open and stick when their trigger gets focus from a mouse click, such as after closing an st.dialog (#17581, #17562).
  • 🐜 Bug fix: Calling .toast() on the object returned by st.toast updates the toast in place again (#17580, #17522).
  • 🐝 Bug fix: The st.chat_input audio waveform stays visible after the text area expands, and recording works with a custom height (#17579, #17528).
  • 🐞 Bug fix: The error for a fragment writing to an outside container without a reserved position explains how to reserve one (#17577, #17563).
  • 🕷️ Bug fix: The "File change" prompt no longer goes missing when run on save is off (#17551).
  • 🪳 Bug fix: The default time slider can reach the end of the day, and other sliders can reach a maximum that falls just past their last full step (#17504, #17494).
  • 🪰 Bug fix: Type hints for st.components match their runtime behavior (#17501).
  • 🦠 Bug fix: Top navigation section dropdowns support arrow-key navigation and follow the expected Tab order, and Tab skips links hidden in the overflow menu (#17423, #17482, #17339).
  • 🦟 Bug fix: Type checkers report unknown container methods, like st.sidebar.echo(), as errors (#17475).
  • 🦂 Bug fix: Custom Components v2 events, st.menu_button selections, and ButtonColumn clicks are no longer lost when another widget updates while their rerun is queued (#17471, #17215).
  • 🦗 Bug fix: After st.logout(), a reconnecting client can't resume the logged-out session or its Session State (#17310).
  • 🕸️ Bug fix: Timedelta columns in st.dataframe and st.data_editor display as readable durations, sort by value, and can be edited. NumberColumn also has a new "duration" format (#16722, #8949, #9751).

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