OpenAI will retire the once-groundbreaking model by month's end. GPT-4o is the new flagship and GPT-5 is waiting in the wings.

OpenAI will soon retire GPT-4, an AI model it launched over two years ago, from ChatGPT, the company announced in a changelog.

Currently, subscribers can access GPT-4 under the model toggle, but they will be met with a caution symbol alerting them that ...