OpenAI officially announced that it will release the first open weight language model since GPT-2

According to IT Home, OpenAI CEO Sam Altman announced today that a "powerful new open weight language model" will be released in the coming months with reasoning capabilities. So far, users can only use its models through OpenAI's interface or integrate its API key into their applications, which means that the model itself remains secret and proprietary. However, open weight models are different. The pre-trained parameters in these models (the "weights" that define how the model responds) are openly shared with the public. Developers and researchers can download them, run them locally, fine-tune them for specific use cases, or insert them into custom applications.

It is worth noting that just because the weights are open does not mean that they are open source. The training code, data sets, and detailed logs may still remain proprietary or undisclosed, so they may not be completely open source.