Anthropic's Valuation Surpasses OpenAI for the First Time in Private Markets

Secondary market trading now prices Anthropic at $863 billion versus OpenAI's $846 billion, a reversal driven largely by the Mythos announcement.

Anthropic's valuation in private secondary markets has surged past OpenAI's for the first time, reaching $863 billion compared to OpenAI's $846 billion, as @scaling01 reported. The crossover appears directly linked to the Mythos announcement and its demonstration of frontier-level capability in a domain — cybersecurity — that carries enormous commercial and national security implications.

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