# December 17, 2025 - Glow Up Another big release here at Mito. This time we've made a new theme, make dataframes easier on the eye, and added OpenAI's latest model. ### A More Modern UI We've released our first Mito theme, and it looks great. The theme introduces a more cohesive color palette, cell numbering. We've also revamped the header to make finding Jupyter actions easier. We've also added a new spreadsheet button to the notebook footer, so you can easily create a Mitosheet. Lastly, dataframes received a much need face lift. ### Agent Quality of Life Changes Our ever popular Agent mode also saw some welcomed additions in this recent update. To start, we've introduced an audio cue to let you know the agent has completed its task — so feel free to switch tabs. Code blocks in the chat task pane now have a direct link to the edited cell, so you can click to see the change in the notebook. You can also tag cells. Try @-ing cell 1. Finally, we've added a message to let you know when a cell is running. Previously we'd only show a generic "thinking" message. ### Other Changes * GPT-5.2 support. * Gemini 3 Flash support. * Support for uploading multiple files via drag-and-drop. * Removed "format" from list of blacklisted words. * Re-added mito-ai update notification for desktop users. * Added instructions to mitigate try/except usage. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.trymito.io/misc/release-notes/december-17-2025-glow-up.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.