Microsoft said Monday that it is making a “multiyear, multibillion-dollar” investment in OpenAI, the San Francisco artificial intelligence lab behind experimental online chatbot ChatGPT. The companies did not disclose the specific financial terms of the deal, but a person familiar with the matter said Microsoft will invest $10 billion in OpenAI. Microsoft had already invested more than $3 billion in OpenAI, and the new deal is a clear indication of the importance of OpenAI’s technology to the future of Microsoft and its competition with other big tech companies like Google, Meta and Apple.