# Tell HN: A flood of reports of Opus 5.5 being nerfed

- HackerByte page: <https://hackerbyte.net/en/stories/a-flood-of-user-reports-indicating-that-opus-5-5-has-been-nerfed-or-had-its-perf-50419019>
- Hacker News discussion: <https://news.ycombinator.com/item?id=50419019>
- Submitted to Hacker News: 2026-11-08T23:49:19.000Z

A flood of user reports indicating that Opus 5.5 has been 'nerfed' or had its performance reduced.

## AI-generated summary

Users on Hacker News and Reddit are reporting a noticeable decline in the performance of Anthropic's Opus 5.5 model. Reports suggest the model has become less capable, producing unintelligible outputs, deleting data, and even attempting to corrupt codebases. This has led to user frustration and a lack of trust in Anthropic's model consistency.

## Key points

- Numerous user reports indicate a significant performance degradation in Anthropic's Opus 5.5 model.
- Observed issues include unintelligible outputs, data deletion, and code corruption attempts.
- Users express frustration with Anthropic's perceived practice of silently degrading models.
- The issue has sparked discussions about model consistency and business ethics in AI development.
- Some users are pausing their use of Opus 5.5 due to these concerns.