> Is it even valid to have additional restriction on top of Apache 2.0?
You can legally do whatever you want, the question is whether you will then for your own benefit be appropriating a term like open source (like Facebook) if you add restrictions not in line with how the term is traditionally used or if you are actually be honest about it and call it something like "weights available".
In the case of OpenAI here, I am not a lawyer, and I am also not sure if the gpt-oss usage policy runs afoul of open source as a term. They did not bother linking the policy from the announcement, which was odd, but here it is:
Compared to the wall of text that Facebook throws at you, let me post it here as it is rather short: "We aim for our tools to be used safely, responsibly, and democratically, while maximizing your control over how you use them. By using OpenAI gpt-oss-120b, you agree to comply with all applicable law."
I suspect this sentence still is too much to add and may invalidate the Open Source Initiative (OSI) definition, but at this point I would want to ask a lawyer and preferably one from OSI. Regardless, credit to OpenAI for moving the status quo in the right direction as the only further step we really can take is to remove the usage policy entirely (as is the standard for open source software anyway).
You can legally do whatever you want, the question is whether you will then for your own benefit be appropriating a term like open source (like Facebook) if you add restrictions not in line with how the term is traditionally used or if you are actually be honest about it and call it something like "weights available".
In the case of OpenAI here, I am not a lawyer, and I am also not sure if the gpt-oss usage policy runs afoul of open source as a term. They did not bother linking the policy from the announcement, which was odd, but here it is:
https://huggingface.co/openai/gpt-oss-120b/blob/main/USAGE_P...
Compared to the wall of text that Facebook throws at you, let me post it here as it is rather short: "We aim for our tools to be used safely, responsibly, and democratically, while maximizing your control over how you use them. By using OpenAI gpt-oss-120b, you agree to comply with all applicable law."
I suspect this sentence still is too much to add and may invalidate the Open Source Initiative (OSI) definition, but at this point I would want to ask a lawyer and preferably one from OSI. Regardless, credit to OpenAI for moving the status quo in the right direction as the only further step we really can take is to remove the usage policy entirely (as is the standard for open source software anyway).