OpenAI has secured a significant financial boost with a $4 billion revolving credit line from major banks, including JPMorgan Chase and Citi, following a recent $6.6 billion funding round. This financial arrangement increases OpenAI's liquidity to over $10 billion, allowing the company to invest in new projects, infrastructure, and talent. The recent funding round valued OpenAI at $157 billion, making it one of the most valuable privately held startups. Key investors include Thrive Capital, Microsoft, Nvidia, and SoftBank, with some banks also serving as OpenAI's clients. The credit line, which includes an option to expand by another $2 billion, carries an interest rate of 6%. OpenAI plans to use these funds to support its growth in the competitive AI industry, despite expected operational losses of over $5 billion this year.