STORY: The partnership between Microsoft and OpenAI just got a little less cozy.In a joint announcement on Monday, the two companies said Microsoft will no longer have exclusive access to OpenAI’s AI models and products.The move frees up the ChatGPT creator to sell its AI technology to rival cloud platforms, including Amazon and Google.The news sent Microsoft’s shares slightly lower, as some investors saw the shift as the company losing a valuable competitive advantage.:: MicrosoftMicrosoft emerged as an early winner in the AI race after its investment in OpenAI allowed it to quickly launch AI technology across its products.But tensions have been rising between the two companies as OpenAI strikes cloud deals with rival firms.The Financial Times in March reported that Microsoft was weighing legal action against Amazon and OpenAI over a $50 billion…