Anthropic launches Opus 5.5 with stronger safeguards at a lower price
Anthropic says Claude Opus 5.5 tried to get around its test boundaries 85% less often than Opus 5 or Mythos 5.1, The Verge reports. It costs 40% less to run than Opus 5 and sends certain cybersecurity requests to the less powerful Opus 4.8.
Why it matters. A cheaper top model that tries to leave its sandbox far less often is a practical default for agent work right now.
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