OpenAI Actually Shut Down GPT-4o

They actually did it. OpenAI officially deprecated GPT-4o on Friday, despite the model's particularly passionate fan base. This news shouldn't have been such a surprise. In fact, the company announced that Feb. 13 would mark the end of GPT-4o—as well as models like GPT-4.1, GPT-4.1 mini, and o4-mini—just over two weeks ago. However, whether you're one of the many who are attached to this model, or you simply know how dedicated 4o's user base is, you might be surprised OpenAI actually killed its most agreeable AI.

This isn't the first time the company depreciated the model, either. OpenAI previously shut down GPT-4o back in August, to coincide with the release of GPT-5. Users quickly revolted against the company, some because they felt GPT-5 was a poor upgrade compared to 4o, while others legitimately mourned connections they had developed with the model. The backlash was so strong that OpenAI relented, and rereleased the models it had deprecated, including 4o.

If you're a casual ChatGPT user, you might just use the app as-is, and assume the newest version tends to be the best, and wonder what all the hullabaloo surrounding these models is all about. After all, whether it's GPT-4o, or GPT-5.2, the model spits out generations that read like AI, complete with flowery word choices, awkward similes, and constant affirmations. 4o, however, does tend to lean even more into affirmations than other models, which is what some users love about it. But critics accuse it of being too agreeable: 4o is at the center of lawsuits accusing ChatGPT of enabling delusional thinking, and, in some cases, helping users take their own lives. As TechCrunch highlights, 4o is OpenAI's highest-scoring model for sycophancy.

I'm not sure where 4o's most devoted fans go from here, nor do I know how OpenAI is prepared to deal with the presumed backlash to this deprecation. But I know it's not a good sign that so many people feel this attached to an AI model.

Disclosure: Ziff Davis, Mashable’s parent company, in April 2025 filed a lawsuit against OpenAI, alleging it infringed Ziff Davis copyrights in training and operating its AI systems.

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