"But as a hedge against not having explicit control of OpenAI, Microsoft negotiated contracts that gave it rights to OpenAI’s intellectual property, copies of the source code for its key systems as well as the “weights” that guide the system’s results after it has been trained on data, according to three people familiar with the deal, who were not allowed to publicly discuss it."
Source: https://www.nytimes.com/2023/11/20/technology/openai-microso...