This has to be just an extension of their previous raise, right? This was a month ago: https://openai.com/index/scaling-ai-for-everyone/
Maybe? Previous valuation is $730B + $122B raised in this announcement = $852B valuation in this announcement (no actual increase in valuation)
Doesn't look like it, that previous round was entirely Softbank + Nvidia + Amazon, while this one is VC + private investors.
The valuation seems odd though, you'd expect $840B post-money from that earlier round?