A joint statement from OpenAI and Microsoft

OpenAI and Microsoft said on September 11, 2025 they signed a non-binding MOU for the next phase of their partnership and are working on a definitive agreement. The post discloses only the MOU and the plan to finalize terms, not funding, term length, compute, or equity changes. This is not a closed contract yet; it is a signal that talks continue.

Why it matters: Primary-source signal on the industry's most important AI partnership. HKR-H/R pass because the OpenAI-Microsoft reset is inherently clickable and strategic; HKR-K fails because the post gives only a non-binding MOU and a pending definitive agreement, with no economics, term, or