This illustration photograph shows screens displaying the logo of DeepSeek, a Chinese artificial intelligence company that develops open-source large language models, and the logo of OpenAI’s artificial intelligence chatbot ChatGPT in Toulouse, France, on Jan. 29, 2025. Lionel Bonaventure/AFP via Getty Images
OpenAI on Aug. 5 released two open-weight language models, the company’s first such release since GPT-2 in 2019.
Open-weight models make their training parameters, or weights, publicly available but tend not to provide access to the source code or datasets. Open-source models typically include access to the source code, weights, and methodologies.