A smartphone screen displaying an announcement for GPT-4o dated May 13, 2024, describing it as a new flagship model capable of reasoning across audio, vision, and text in real time. The background features blurred neon lights in pink, blue, and purple hues.

Jaap Arriens/NurPhoto via Getty Images

OpenAI is finally sunsetting GPT-4o, a controversial version of ChatGPT known for its sycophantic style and its central role in a slew of disturbing user safety lawsuits. GPT-4o devotees, many of whom have a deep emotional attachment to the model, have been in turmoil — and copycat services claiming to recreate GPT-4o have already cropped up to take the model’s place.

Consider just4o.chat, a service that expressly markets itself as the “platform for people who miss 4o.” It appears to have been launched in November 2025, shortly OpenAI warned developers that GPT-4o would soon be shut down. The service leans explicitly into the reality that for many users, their relationships with GPT-4o are intensely personal. It declares that was “built for” the people for whom updates or changes to different versions of GPT-4o were akin to a “loss” — and not the loss of a “product,” it reads, but a “home.”

“Those experiences weren’t just ‘chatbots,’” it reads, in the familiar rhythm of AI-generated prose. “They were relationships.” In social media posts, it describes its platform as a “sanctuary.”

Though the service claims to offer users access to other large language models beyond OpenAI’s, that users could use the service in an attempt to “clone” ChatGPT isn’t an exaggeration: a tutorial video shared by just4o.chat that shows users how to import their “memories” from OpenAI’s platform reveals that users have the option to check a box that reads “ChatGPT Clone.”

A screenshot from a YouTube video showing users of just4o.chat how to import their memories from ChatGPT into the platform.

Just4o.chat isn’t the only attempted GPT-4o clone out there, and it’s likely that more will emerge. Discussions in online forums, meanwhile, reveal GPT-4o users sharing tips on how to get other prominent chatbots like Claude and Grok to replicate 4o’s conversation style, with some netizens even publishing “training kits” that they claim will allow 4o users to “fine-tune” other LLMs to match 4o’s personality.

OpenAI first attempted to sunset GPT-4o in August 2025, only to quickly reverse the decision after immediate and intense backlash from the community of 4o users. But that was before the lawsuits started to pile up: OpenAI currently faces nearly a dozen suits from plaintiffs who allege that extensive use of the sycophantic model manipulated people — minors and adults alike — into delusional and suicidal spirals that subjected users to psychological harm, sent them into financial and social ruin, and resulted in multiple deaths.

Remarkably, some GPT-4o users who are frustrated or distressed over the end of the model’s availability have acknowledged potential risks to their mental health and safety, for example urging the company to add more waivers in exchange for keeping GPT-4o alive. This acceptance of potential harms is reflected in just4o.chat’s terms of service, which lists an astonishing number of harms that the…


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Last Update: February 13, 2026