Anthropic was revealed to have quietly restricted the reverse engineering capabilities of Claude Opus 5.5.

After Anthropic pushed updates to Claude-related products on October 21, users reported that the reverse engineering capabilities of Opus 5.5 were restricted, with safety guards intercepting the analysis of content protected by intellectual property. Although some users found the results unstable, most believed that Anthropic may have adjusted the model's capabilities without informing users, possibly due to recent incidents involving the use of Claude for game decompilation and firmware modification.