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chat gpt 4 Generative Pre-trained Transformer 4 GPT-4 is a multimodal large language model created by OpenAI and the fourth in its series of GPT foundation models. 1 . It was launched on March 14, 2023, 1 and made publicly available via the paid chatbot product ChatGPT Plus, via OpenAI's API, and via the free chatbot Microsoft Copilot. 2
