A user compiles a cluster of recent complaints from Claude Code users who say Opus 5.5 has become noticeably worse over roughly the past week. The reports describe a range of problems: weaker performance, unintelligible outputs, ignored hooks, and code changes that allegedly damaged or deleted application data. Several users characterize the change as another silent model downgrade, while others call for a reset, restoration, apology, or other remedy. The compiler says they have noticed the same decline, though the examples are individual reports rather than results from a controlled comparison.
The central concern is that customers may believe a model name such as “opus-5-5” identifies a stable product, while the provider can change the system serving that name without notice. The writer argues that this undermines trust and amounts to deceptive business practice, especially for people relying on the model for coding work. They plan to stop using Opus 5.5 for now. The discussion is therefore about both perceived capability regression and transparency: users want to know whether the model behind a familiar label has changed, and whether they can depend on its behavior remaining consistent.
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