Some of that cash is reportedly headed for $500B Stargate dream The AI investment landscape is shifting once again, with SoftBank reportedly finalizing a $40 billion stake in OpenAI - pushing its valuation to around $300 billion.

This is a developing story. Check back for updates. Softbank is close to finalizing a $40 billion primary invest in OpenAI at $260 billion pre-money valuation, sources told CNBC’s David Faber.

Sources at Open AI believe DeepSeek unlawfully distilled data from ChatGPT, Open AI and Microsoft begin investigation.

Microsoft Corp. and OpenAI are investigating whether data output from OpenAI’s technology was obtained in an unauthorized manner by a group linked to Chinese artificial intelligence startup DeepSeek,

Just a few hours after David Sacks claimed DeepSeek used OpenAI’s models to train its own models, Bloomberg Law reports that Microsoft is investigating