section_path: Service/GPT-4
section_name: GPT-4
paragraph_text: GPT-4
  
  Generative Pre-trained Transformer 4 (GPT-4) is a multimodal large language model trained and created by OpenAI and the fourth in its series of GPT foundation models. It was launched on March 14, 2023, and made publicly available via the paid chatbot product ChatGPT Plus until being replaced in 2025, via OpenAI's API, and via the free chatbot Microsoft Copilot.
  
  In November 2023, OpenAI launched GPT-4 Turbo with a 128,000 token context window. This was a significant improvement over GPT-4's 32,000 token maximum context window.