overview
What is GPT-4?
GPT-4 is a large multimodal model tool developed by OpenAI that enables developers and businesses to accept image and text inputs and produce text outputs. It exhibits human-level performance on professional and academic benchmarks. Released on March 14, 2023, GPT-4 has significantly advanced the field of artificial intelligence. While newer models like GPT-5 have superseded it in the primary ChatGPT interface, GPT-4 and its direct successors, including GPT-4 Turbo and GPT-4o, remain available and widely utilized through OpenAI's API. GPT-4 Turbo, announced in November 2023, featured a 128,000 token context window and an updated knowledge cutoff of December 2023. GPT-4o, released in May 2024, is a multimodal and multilingual model capable of natively processing and generating text, audio, and images, with response times as low as 320 milliseconds. A more cost-effective version, GPT-4o mini, was released on July 18, 2024, replacing GPT-3.5 Turbo on the ChatGPT interface. Despite the retirement of GPT-4.5 and other GPT-4 models from ChatGPT as of May 29, 2026, the core GPT-4 models continue to be accessible for developers via the OpenAI API.