OpenAI will retire GPT-4 from ChatGPT by April 30 and introduce new GPT-4.1 models soon

OpenAI has announced that GPT-4 will be fully retired from ChatGPT on April 30, 2025, and replaced by GPT-4o, which now serves as the default model. Despite its removal from ChatGPT, GPT-4 will remain accessible via OpenAI's API. According to OpenAI, GPT-4o already surpasses GPT-4 in tasks such as writing, coding, and STEM-related activities, benefiting from recent updates that improve instruction following, problem-solving, and conversational flow.

GPT-4, which debuted in March 2023, was notable for its multimodal capabilities, handling both images and text. It powered ChatGPT and Microsoft Copilot. OpenAI CEO Sam Altman disclosed that GPT-4 was an extremely large model, with training costs exceeding $100 million.

OpenAI is also working on a new family of models, including GPT-4.1, GPT-4.1-mini, and GPT-4.1-nano. Additionally, they are finalizing the o3 reasoning model and an o4-mini model, with references to o4-mini, o4-mini-high, and o3 found in the ChatGPT web version, suggesting an impending release.