OpenAI is set to retire several older ChatGPT models on February 13, 2026, including the well-known GPT-4o. This change affects users who currently rely on these models within the ChatGPT app, as they will no longer be selectable. However, developers will still have access to these models through OpenAI’s API for the foreseeable future.
In response to user feedback, OpenAI has enhanced ChatGPT’s customization options, introducing multiple personalities and custom instructions that allow users greater control over their interactions. This guide explains what the upcoming changes mean for different user groups and how to transition smoothly to newer models and customization features.
Overview of OpenAI’s Upcoming Model Retirement
On February 13, 2026, OpenAI will remove the following older models from ChatGPT’s model picker:
- GPT-4o
- GPT-4.1
- GPT-4.1 mini
- OpenAI o4-mini
While these models will no longer be accessible within ChatGPT’s interface, they will remain available via the API for developers who depend on them in their applications. This retirement follows a previous removal of GPT-4o in August 2025, coinciding with GPT-5’s release, which was reversed after a wave of user backlash.
Who Is Affected by the Model Retirement?
The retirement primarily impacts three groups:
- ChatGPT users currently choosing GPT-4o or other retiring models: These users will no longer find these options available in the ChatGPT app after February 13.
- Paid ChatGPT subscribers: Those who have access to additional model toggles will lose the ability to select the retiring models within the app but can continue using them through the API.
- Developers: Applications relying on older models will still be able to access them via the API, although eventual future retirements could occur.
It’s important to note that only about 0.1% of ChatGPT users interact with the GPT-4o model daily, so the impact on the overall user base is limited.
Understanding the Differences Between GPT-4o and GPT-5
Users familiar with GPT-4o have noted its warmer and friendlier tone compared to GPT-5’s more straightforward and efficient responses. OpenAI is actively working on refining GPT-5’s personality to strike a better balance—making it warmer but less intrusive than GPT-4o.
This personality refinement is part of OpenAI’s broader commitment to enhancing user experience, ensuring that newer models not only deliver improved technical performance but also align better with user preferences.
Getting Started with ChatGPT’s New Personality Customization
Alongside the retirement of older models, OpenAI has introduced new options for customizing ChatGPT’s personality. Users can now choose from seven distinct personalities and define custom instructions to tailor interactions according to their preferences.
This update allows both free and paid users to personalize how ChatGPT responds, making the experience more engaging and suited to individual needs. Paid users, in particular, benefit from toggling between different personalities and models, enhancing their productivity and enjoyment.
How to Transition Smoothly After February 13, 2026
If you currently use GPT-4o or other retiring models, here are some practical steps to prepare:
Explore the new personality options: Experiment with the seven available personalities and custom instructions to find a style that suits you.
Switch to GPT-5: Familiarize yourself with GPT-5’s capabilities and style. The model offers improved performance and is evolving to better match user tone preferences.
For developers: Update your applications to support GPT-5 or other newer models, while noting that the older models will remain accessible via API for now.
Stay informed: Follow OpenAI’s announcements for future updates or additional model changes.
FAQs
Why is OpenAI retiring GPT-4o and other models?
OpenAI is retiring older models to streamline the ChatGPT experience and focus on improving and maintaining the latest models like GPT-5. This helps optimize resources and deliver better performance and features.
Will free users lose access to GPT-4o and the other retiring models?
Yes, after February 13, 2026, these models will no longer be selectable within the ChatGPT app for any users, including free users. However, since only a small percentage actively use these models, the impact is minimal.
Can developers still use GPT-4o after February 13, 2026?
Yes, the retiring models will remain available through OpenAI’s API, allowing developers to maintain compatibility in their applications for the time being.
What are the new personality customization options in ChatGPT?
OpenAI has introduced seven distinct personalities and the ability to set custom instructions, allowing users to tailor ChatGPT’s tone and style to their preferences for a more personalized experience.
How can I make my transition to GPT-5 easier?
Start by exploring GPT-5’s features and personality. Use the new customization options to adjust the interaction style. For developers, update your codebase to integrate GPT-5 and test thoroughly before retiring older model support.
What to Do Next
Mark your calendar for February 13, 2026, to avoid disruption. Begin experimenting with ChatGPT’s new personality features now to find what works best for you. If you’re a developer, plan for migrating your applications to newer models and monitor OpenAI’s updates for future changes. Staying proactive will ensure a smooth transition and help you make the most of ChatGPT’s evolving capabilities.
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