Microsoft ends its OpenAI exclusivity and starts adding Anthropic to Copilot

Microsoft and OpenAI did not break up this spring. They grew up, turning the most-watched AI commercial relationship into a normal, non-exclusive partnership with optionality on both sides.

The change was announced on April 27, 2026 in parallel posts by OpenAI and Microsoft. The deal that had tied OpenAI to a single cloud, and Microsoft to a single lab, is no longer exclusive on either side. The artificial general intelligence clause that once governed the relationship, a provision tied to whether OpenAI had built AI that matches or exceeds humans on a wide range of tasks, is gone. The intellectual property license Microsoft holds now runs through 2032 but is non-exclusive, according to the two companies and Reuters.

The first visible test of the new freedom is already in production. Microsoft has been adding Anthropic's Claude model, made by an OpenAI rival, to parts of its Copilot assistant lineup. Copilot is Microsoft's branded AI helper that runs across Word, Excel, Windows, and Bing. Anthropic's Claude, the company's flagship large language model, now sits alongside OpenAI's GPT family inside at least some Copilot experiences, a hedge that would have been hard to imagine a year ago.

OpenAI can now license its technology to other companies, not just through Microsoft, and it can use other cloud providers to serve its products. Microsoft remains the primary cloud partner; new OpenAI products are still expected to launch on Azure first, unless Microsoft cannot or chooses not to support them. The Information first reported the contours of the new arrangement.

Microsoft no longer pays OpenAI a share of its own OpenAI-related revenue, a piece of the old economics that rewarded both sides for selling more OpenAI product through Microsoft channels. OpenAI continues to pay Microsoft through 2030, but those payments now have a cap, putting a ceiling on the largest single cost line on the OpenAI side of the relationship. Microsoft has invested more than $13 billion in OpenAI over the years and remains a major shareholder, so the partnership did not unwind. It was re-priced.

For the AI supply chain, the practical effect is more choice at the top. OpenAI is no longer locked to a single hyperscaler. Microsoft is no longer locked to a single lab. That is a structural change, and it shows up in the way both sides are already spending their new freedom.

Investors read the deal as a slight negative for Microsoft on the day. The watch items from here are whether OpenAI signs the cloud deals the reset unlocks, with Oracle, AWS, and Google the obvious candidates, and how broadly Microsoft extends Anthropic inside Copilot before the next GPT-class models arrive.