Users reported failures of Claude Opus 5.5 in reverse engineering tasks
Users of Claude Opus 5.5 have started to complain that the service is increasingly refusing to perform tasks related to reverse engineering software and games. The first such complaints appeared on October 21st.
As reported by Kotaku, users have noticed that sometimes Claude begins to perform a task but interrupts the response due to the activation of the security system. Enthusiasts using REA (Reverse Engineer Anything) have faced particular issues. This is an open tool that allows connecting AI agents to programs for analyzing executable code, including Ghidra and IDA.
Anthropic has not publicly announced any policy change or released a new version of Opus 5.5. However, journalists noted that on October 21st, the company updated several Claude products, coinciding with the first complaints in terms of timing.
Interest in the topic is linked to the fact that Claude Opus 5.5, introduced on September 22nd, has been associated by users with the recent increase in the number of amateur ports. In the past month, browser versions of Halo: Combat Evolved, GTA: Vice City, and The Simpsons: Hit & Run have appeared online. Simultaneously, open copies of paid programs have also started circulating.
Opinions on the situation vary. Some users claim that everything is working as before and that such restrictions have triggered in the past. Others associate the situation with bans on bypassing copy protection and encryption. The owner of a major gaming forum called the reports of hidden restrictions unreliable. Anthropic has not commented on the situation.