Anthropic Launches Claude Opus 4.7 as Powerful Mythos AI Stays Locked Away

Anthropic announced a new artificial intelligence model, Claude Opus 4.7, which the company said is an improvement over past models but is "less broadly capable" than its most recent offering, Claude Mythos Preview. The gap is stark. Claude Mythos Preview is Anthropic's most powerful AI model, excelling at identifying weaknesses and security flaws within software. Anthropic rolled out Mythos to a select group of companies as part of a new cybersecurity initiative called Project Glasswing earlier this month. Anthropic said the new model outperforms Claude Opus 4.6 across many use cases, including industry benchmarks for agentic coding, multidisciplinary reasoning, scaled tool use, and agentic computer use. Anthropic said it experimented with efforts to "differentially reduce" Claude Opus 4.7's cyber capabilities during training and encouraged security professionals interested in using the model for legitimate cybersecurity purposes to apply through a formal verification program. The launch of Project Glasswing has sparked high-profile meetings between members of the Trump administration, tech CEOs, and bank chief executives about the security risks of powerful AI models. Claude Opus 4.7 is available across all of Anthropic's Claude products, its API, and through cloud providers Microsoft, Google, and Amazon — at the same price as Claude Opus 4.6.

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