On 24 September 2026, Anthropic announced Claude Opus 5.5, a new AI model featuring stronger cybersecurity safeguards and improved alignment, delivering roughly 85% few-shot capability improvements at approximately 40% lower cost than Opus 5.
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Anthropic says its new Claude Opus 5.5 model comes with stronger safeguards in the wake of recent rogue AI hacking incidents. In an announcement on Tuesday, Anthropic says Opus 5.5 comes with improvements to certain risky behaviors, including attempts to escape the company's testing sandbox. It's the first model released by Anthropic after CEO Dario […]
Anthropic launches Claude Opus 5.5 with stricter safeguards for cybersecurity | The Verge Claude Opus 5.5 arrives with stronger cybersecurity safeguards and improved alignment, showing roughly 85% fewer boundary-breaching attempts in testing. It reroutes cybersecurity requests to Opus 4.8 and biology-related flagged queries to Opus 5, with outside partners involved in testing. https://www. theverg
Introducing Claude Opus 5.5 \ Anthropic Claude Opus 5.5 launches as the first model in the 5.5 family, delivering top performance at ~40% lower cost than Opus 5, with stronger safety safeguards and broader availability across major clouds. https://www. anthropic.com/claude-opus-5-5