We measured Opus 5.5 for 30 days. Here's what we found
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Ranked by a public rubric, not by votes: what a comment adds counts, not who wrote it. How comments are ranked · Comment rules
Summary
An independent 34-day tracker called LiveNerf measured whether Anthropic's Opus 5.5 degraded after launch, using a frozen panel of 78 questions run daily. So far it has found no statistically significant accuracy decline, though its detection threshold is about 6.6 points per 10-day window.