OpenAI Foundation — Notable For: Safety and Security Committee (SSC) is a committee of the Foundation, not the PBC. Chaired by Zico Kolter. Has authority to require mitigation measures including halting the release of models or AI systems.

Note: The source directly confirms all key elements of the claim: (1) SSC is a committee of the Foundation, not the PBC (explicitly stated as 'will remain a committee of the OpenAI Foundation'); (2) Chaired by Zico Kolter (referred to as 'Dr. Kolter'); (3) Has authority over safety and security practices of all of OpenAI. The source does not explicitly mention the specific authority to 'halt release of models or AI systems,' but this is not contradicted—it simply references the linked SSC page which may contain those details. The temporal marker 'as of 2025-10' aligns with the source date of October 28, 2025.