Can no longer reverse-engineer everything? Reports suggest Anthropic quietly restricted Claude Opus 5.5's ability to perform reverse engineering.
Following the October 21 product update, many users reported that Opus 5.5 was being blocked mid-stream when attempting to reverse-engineer content protected by intellectual property rights. However, some users also noted that its reverse-engineering capabilities have never been stable. Anthropic has frequently made silent adjustments to the model without updating documentation.
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