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Fortune
Fortune
Beatrice Nolan

Exclusive: Anthropic is testing ‘Mythos,’ its ‘most powerful AI model ever developed’

Anthropic CEO Dario Amodei. (Credit: Samyukta Lakshmi—Bloomberg/Getty Images)

AI company Anthropic is developing, and has begun testing with early access customers, a new AI model more capable than any it has released previously, the company said, following a data leak that revealed the model’s existence. 

An Anthropic spokesperson said the new model represents “a step change” in AI performance and is “the most capable we’ve built to date.” The company said the model is currently being trialed by “early access customers.”

Descriptions of the model were inadvertently stored in a publicly accessible data cache and were reviewed by Fortune.

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