OpenAI has secured $11 billion in the first tranche of a funding round valuing it at $1.25 trillion, with the total potentially reaching $20 billion. The fundraising comes amid a tech sell-off. By Krystal Hu Nov 6 (Reuters) - OpenAI has closed on new funding of $11 billion, the initial part of a round that values the company at $1.25 trillion, a source familiar with the matter said on.