Ashley Capoot / CNBC : OpenAI plans to retire several models from ChatGPT on February 13, including GPT‑4o, GPT‑4.1, and o4-mini, saying only 0.1% of users still choose GPT-4o —  OpenAI announced it will retire several models from its ChatGPT chatbot next month, including its GPT‑4o model that is beloved by some users.