The inside story of ChatGPT: How OpenAI founder Sam Altman. Microsoft's big ChatGPT investment should have the. Microsoft in Talks to Invest $10B Into ChatGPT Owner: Semafor. Microsoft May Back ChatGPT Creator With $10 Billion Investment. Microsoft Reportedly Closing In On $10 Billion. Microsoft is weighing $10 billion investment in OpenAI, sources say. Microsoft's $10 Billion ChatGPT B..