what is the latest large funding rounds for OpenAI and otehr LLM model companies?

The latest large funding round for OpenAI occurred in late February 2026, when the company raised $110 billion in a record-breaking investment from major players including SoftBank ($30 billion), Nvidia ($30 billion), and Amazon ($50 billion) [2][4][9]. This funding, one of the largest private rounds in history, aims to advance OpenAI's AI models, expand capabilities, and integrate new architectures like a "Stateful Runtime Environment" on AWS, valuing the company at potentially over $850 billion [6][7][9]. Earlier talks in January and February 2026 targeted up to $100 billion at valuations from $500 billion to $850 billion, involving investors like Microsoft and sovereign wealth funds [5][7][8]. The sources do not provide details on recent large funding rounds for other specific LLM model companies beyond OpenAI. However, they mention significant investments in related AI ventures, such as World Labs raising $1 billion in February 2026 for world models in 3D and entertainment applications (with $200 million from Autodesk), positioned as a bet against traditional LLMs [10][11], and Ineffable Intelligence securing $1 billion for advanced AI development at a $4 billion valuation, led by ex-DeepMind researcher David Silver [12].