OpenAI Implements Significant UI Overhaul, Shifting Model Selector to Left Panel

OpenAI has rolled out a series of user interface (UI) changes across its platforms, notably repositioning the model selector within its ChatGPT interface. The update moves the model selection tool from a central position to the left-hand side, a change observed by users and developers. This adjustment is part of broader ongoing UI modifications that have prompted varied feedback from the user community.

The specific alteration regarding the model selector was highlighted in a tweet by user "nic" (@nicdunz) on July 14, 2025, who noted, "lots of ui changes everywhere. model selector is now on the left instead of the middle." This particular change affects how users access and switch between the growing array of advanced AI models offered by OpenAI, including recent additions like OpenAI o3-pro, GPT-4.1, and GPT-4.1 mini.

The model selector is a critical feature for paid subscribers of ChatGPT (Plus, Pro, Team, and Enterprise plans), enabling them to choose from various models optimized for different tasks, such as general intelligence (GPT-4o), advanced reasoning (o3, o4-mini), or specialized coding tasks (GPT-4.1). OpenAI's continuous release of new models, including GPT-4.5 which is slated for broader availability, necessitates an efficient and intuitive selection mechanism.

While some users appreciate the continuous evolution, recent UI updates have also drawn criticism within the OpenAI community forums. Discussions from March 2025 indicate concerns over changes to chat window placement and the increased screen real estate occupied by configuration panels, which some users feel detracts from the overall user experience. OpenAI has acknowledged user feedback regarding these changes, emphasizing their commitment to refining the platform.

The relocation of the model selector underscores OpenAI's rapid development cycle and its efforts to integrate new capabilities and models seamlessly into its user-facing products. As the company continues to introduce more specialized and powerful AI models, the accessibility and clarity of interface elements like the model selector remain paramount for user adoption and efficient workflow.