Anthropic may have quietly limited claude opus 5.5's reverse engineering capabilities

On October 21, Anthropic rolled out updates to several Claude-related products, coinciding with a Reddit post claiming that the latest version of Claude Opus 5.5 had its reverse engineering capabilities restricted. Users reported that when instructing the model to reverse-engineer protected content, a security barrier would interrupt the response. One example showed the model stating, 'Security checks terminated this response.' Despite attempts to rephrase the query, no further analysis was generated. While some users argued that reverse engineering with Claude has always been inconsistent, others suggested the change might be a silent adjustment without official announcement. Anthropic has a history of making such changes without prior notice. The move is speculated to be a response to a series of incidents, including the modification of Samsung TV firmware and the open-sourcing of commercial software like Adobe and Microsoft Office, which may have influenced the company's decision.