OpenAI will soon retire GPT-4, an AI model it launched over two years ago, from ChatGPT, according to a changelog posted on Thursday. Effective April 30, GPT-4 will be “fully replaced” by GPT-4o, the current default model in ChatGPT, OpenAI said. GPT-4 will remain available for use via OpenAI’s API. “In head‑to‑head evaluations, [GPT-4o] consistently surpasses GPT‑4 in writing, coding, STEM, and more,” wrote OpenAI in the changelog. “Recent upgrades have further improved GPT‑4o’s instruction fol...