GPT-4

Generative Pre-trained Transformer 4 (GPT-4)
Generative Pre-trained Transformer 4 (GPT-4)
Developer	OpenAI
Initial release	March 14, 2023
Preview release	gpt-4-turbo-2024-04-09 / April 9, 2024
Predecessor	GPT-3; GPT-3.5;
Successor	GPT-4o; GPT-5;
Type	Multimodal; Large language model; Generative pre-trained transformer; Foundation model;
License	Proprietary
Website	openai.com/gpt-4

Generative Pre-trained Transformer 4 (GPT-4) is a large language model developed by OpenAI and the fourth in its series of GPT foundation models.

GPT-4 is preceded by GPT-3.5 and followed by its successor GPT-5. GPT-4V is a version of GPT-4 that can process images in addition to text. OpenAI has not revealed technical details and statistics about GPT-4, such as the precise size of the model.

An early version of GPT-4 was integrated by Microsoft into Bing Chat, launched in February 2023. GPT-4 was released in ChatGPT in March 2023, and removed in 2025. GPT-4 is still available in OpenAI's API.