Microsoft partnership with OpenAI has become increasingly strained by the AI startup’s need for more funding and computing power, Microsoft’s recruitment of leaders from OpenAI rival Inflection AI, and questions over the Redmond company’s equity stake in any future version of OpenAI as a for-profit company.

The “best bromance in tech” has had a reality check as OpenAI has tried to change its deal with Microsoft and the software maker has tried to hedge its bet on the start-up.

The Wall Street Journal today cited sources as saying that OpenAI is being advised by Goldman Sachs. Microsoft, in turn, has reportedly hired Morgan Stanley. The two banks previously participated in a deal that gave the ChatGPT developer access to a $4 billion revolving line of credit.