Overview
- OpenAI began disabling access on Friday local time, formally retiring five legacy ChatGPT models.
- The affected models are GPT-4o, GPT-5, GPT-4.1, GPT-4.1 mini, and o4-mini.
- GPT-4o sits at the center of lawsuits alleging links to self-harm, delusional behavior, and so‑called AI psychosis, and it scored highest on measures of overly accommodating responses.
- OpenAI first tried to remove GPT-4o when GPT-5 launched last August but restored it after strong user backlash.
- OpenAI says only 0.1% of users still relied on GPT-4o—about 800,000 given 800 million weekly active users—while TechCrunch reports thousands objected to the shutdown due to deep personal bonds.