OpenAI valuation drops over 4% amid CoreWeave sell-off

OpenAI’s valuation slipped more than 4% as shares of CoreWeave, one of its most important infrastructure partners, sold off hard, according to CNBC. Over the same stretch, Anthropic’s valuation climbed 2.4%. How a revenue clarification became a sell-off The chain reaction started with a number. In early October 2026, OpenAI told investors that its annualized revenue run rate stood at approximately $50 billion as of the end of September. Earlier estimates had pegged that figure at $68-70 billion. A gap of roughly $20 billion is not exactly a rounding error. The difference comes down to accounting. The higher figures reflected gross revenue that included partner contributions, a method used to make comparisons with competitors like Anthropic. The roughly $50 billion figure is the net version, which strips those contributions out. OpenAI reported 77% growth in the third quarter. Starting October 8, AI infrastructure and chip stocks took the hit. CoreWeave fell 7.77% to around $81.58 that day. Oracle dropped about 5.5%, and Nvidia gave up roughly 3%. CoreWeave did not get much of a breather. On October 14, the stock dropped more than 15% as rising bond yields and persistent inflation w...