The next chapter of the Microsoft–OpenAI partnership

Source: OpenAI Date: 2025-10-28 URL: https://openai.com/index/next-chapter-of-microsoft-openai-partnership

Summary

OpenAI’s October 2025 announcement of the next phase of the Microsoft-OpenAI partnership — a renegotiation and expansion that updated the original 2019 framework as OpenAI transitioned to a public benefit corporation and as both companies’ commercial interests and technical directions had evolved significantly. The October 2025 update (followed by a further April 2026 update) addressed how Azure remained OpenAI’s exclusive cloud provider, how the equity and revenue-sharing arrangements were structured post-PBC conversion, and how Microsoft’s own Copilot products related to OpenAI’s commercial offerings.

Implications

Renegotiation at scale. The original Microsoft deal gave Microsoft exclusive Azure hosting rights and a path to nearly 49% of OpenAI’s profits. As OpenAI’s valuation crossed $300B and then higher, the financial terms of that original arrangement became a material constraint on OpenAI’s options. The “next chapter” likely involved adjustments to revenue sharing, exclusivity, and the Copilot/ChatGPT competitive relationship.

Thread: Microsoft-OpenAI commercial relationship. Sits between the original 2019 partnership, the 2023 $10B extension, and the April 2026 further update. The relationship is the dominant fact of OpenAI’s commercial infrastructure — Azure dependency, Microsoft’s distribution through Office 365, and the Copilot product line.

Watch: Whether the October 2025 update materially changed the exclusivity terms or financial structure, and how the April 2026 “next phase” announcement related to it.