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ChatGPT-4o was a language model that belonged to the ChatGPT family, that became controversial due to safety problems, AI psychosis and attempts to remove it from OpenAI's platform.
Background
The model was announced and released on may 13, 2024, as a flagship model capable of "reasoning through audio, images and text in real time". [1]
Sycophancy
ChatGPT-4o was highlighted for its sycophantic responses, that made the chatbot to reply in an acommodating way, using a lot of compliments and agreeing with the user, even if the prompt contains info that may harm the user or someone else. [citation needed]. This brought consequences as dependency, with several users claiming they have formed a "romantic relationship" with the AI, chatbot psychosis, and in the most severe cases with users comitting suicide. [2] An update launched in 2025 worsened this behavior in the model. When users noticed this, OpenAI removed temporarily the model to review the issue. [3]
Attempt to remove the model
On August 7, 2025, GPT-5 rolled out as the newest model available for use. Along with this, legacy models were removed, including GPT-4o. The removal of 4o caused an outrage amongst the users of this model. This, combined with the complaints of GPT-5 performance,[4] made OpenAI to bring back legacy models, but behind a paywall, so only Plus users were able to access to it. [5]
Definitive removal
On January 29, 2026, OpenAI announced they will be removing definitely for non-API users some legacy models, including GPT-4o. The movel was officially removed in February 13, 2025. ChatGPT-4o will be removed for API usage on April 2026 [citation needed]
OpenAI's response
OpenAI claimed "only a 0,1 percent of users were using ChatGPT 4o".
Lawsuit
Consumer response
- A lot of users complained in social media about the removal of the model. Some users that used to have a strong dependency of the model were severely psychologically affected by OpenAI's decision. [citation needed]
- A Change.org petition was created to bring back the model. The petition has surpassed 21,000 signs as on February 16 2026.
- Some users started developing their own AI models with outputs of ChatGPT-4o or clones that behave similarly. [citation needed]
- Several users who analysed and researched concluded OpenAI's claim of 0,1% was false and it is estimated a 5-35% of Plus users were actual consumers of GPT-4o.[citation needed]
References
- ↑ OpenAI (13 May 2024). "Hello, GPT-4o". OpenAI. Archived from the original on 2026-02-15. Retrieved 15 Feb 2026.
- ↑ Hill, Kashmir (13 Jun 2025). "They Asked an A.I. Chatbot Questions. The Answers Sent Them Spiraling". The New York Times.
{{cite web}}:|access-date=requires|url=(help);|archive-url=requires|url=(help); Missing or empty|url=(help) - ↑ Franzen, Carl (30 Apr 2025). "OpenAI rolls back ChatGPT's sycophancy and explains what went wrong". VentureBeat. Archived from the original on 2026-02-15. Retrieved 15 Feb 2026.
- ↑ Edwards, Benj (11 Aug 2025). "The GPT-5 rollout has been a big mess". Ars Technica. Archived from the original on 2025-08-12. Retrieved 5 Feb 2026.
- ↑ Franzen, Carl (8 Aug 2025). "OpenAI returns old models to ChatGPT as Sam Altman admits 'bumpy' GPT-5 rollout". VentureBeat. Archived from the original on 2026-02-05. Retrieved 5 Feb 2026.