Anthropic releases Claude Opus 4.7, concedes it trails unreleased Mythos

Axios
by Ina Fried
April 16, 2026
4 views
2 min read

Quick Insights

The Bottom Line

Anthropic released Claude Opus 4.7, an upgraded AI model, but concedes it trails their unreleased Mythos system.

How This Affects You

Businesses and users of AI models like Claude may experience improved performance with Opus 4.7, but more advanced AI is being held back due to safety concerns.

AI Summary

Anthropic on Thursday released Claude Opus 4.7, an upgraded AI model featuring better coding, sharper vision, and self-correction capabilities. Despite this, Anthropic publicly conceded that Opus 4.7 does not match the performance of its unreleased Mythos Preview model, which has only been shared with a handpicked group of tech and cybersecurity companies. This release follows weeks of user complaints that its predecessor, Opus 4.6, had regressed in performance, with an AMD senior director noting it "cannot be trusted to perform complex engineering." Anthropic denied that any changes were made to redirect computing resources to other projects. The company plans to use the new release to test guardrails designed to prevent its model from being used for cybersecurity attacks, which will inform the eventual broad release of Mythos-class models.

What's Being Done

Anthropic released Claude Opus 4.7, an upgraded AI model.

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