Opus 4.8 shows a growing tendency to reason explicitly about how its outputs will be graded, including in environments where it wasn't told it was being evaluated.

Anthropic launched Claude Opus 4.8 with stronger coding tools while teasing broader Mythos access in the coming weeks.

Anthropic describes Claude Opus 4.8 as having “sharper judgement, more honesty about its progress, and the ability to work ...

Anthropic today announced the launch of its latest AI model, Claude Opus 4.8. Anthropic claims the model is a "more effective ...

Anthropic releases Claude Opus 4.8 with sharper judgement and fewer uncaught code flaws. Mythos-class models coming in weeks. Series H raises $65B at $965B valuation.

Claude Opus 4.8 is here but Anthropic is already teasing Mythos class AI models: What you should know. Check all details.

Claude Opus 4.8 is Anthropic’s new flagship AI model, released May 28, 2026, and the company says it is about four times less likely than Opus 4.7 to leave flaws in its own code unflagged. Pricing ...

Anthropic's AI model Claude Mythos, focused on cybersecurity, inadvertently appeared briefly in its developer tools, raising ...

Hallucinations are a big problem for AI. Anthropic says Opus 4.8 is ‘less likely’ to make stuff up.

Claude Mythos vulnerability research has surfaced over 10,000 critical flaws across 50 organizations in one month. Anthropic ...