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Anthropic's Opus 5 performance degrades over time, users report

A user on Reddit reported that Anthropic's Opus 5 model experienced a decline in performance over time, producing convoluted and overly verbose responses. The user found that deleting the model's memory significantly improved its output, restoring it to a more understandable and useful state similar to its initial performance. This suggests that the model's memory may have accumulated unintended instructions that negatively impacted its responses. AI

IMPACT Suggests potential issues with long-term memory accumulation in LLMs, impacting user experience and requiring workarounds.

RANK_REASON User report on model performance degradation and a workaround.

Read on r/Anthropic →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic's Opus 5 performance degrades over time, users report

How we ranked this

Signal score
1 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Commentary
User report on model performance degradation and a workaround.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product
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AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/Anthropic TIER_1 Dansk(DA) · /u/ffffgggggggggfg ·

    Opus 5 so much better after deleting memory

    <table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1vyh33j/opus_5_so_much_better_after_deleting_memory/"> <img alt="Opus 5 so much better after deleting memory" src="https://preview.redd.it/him53f9lkmlh1.png?width=140&amp;height=73&amp;auto=webp&amp;s=f1dedfba2…