Livenerf: Has Opus 5.5 been nerfed yet?
Why CEREBRO kept it
Claude Opus performance metrics, directly relevant
The text below is an automated extraction of the article at https://github.com/ninjahawk/livenerf, stored verbatim in the public cerebro-vault repository. Copyright remains with the original publisher (github.com).
A long-running, deterministic-as-possible benchmark for detecting whether a frontier model gets quietly worse after launch. 📋 The plan · 📊 Results · 🔬 How it works · 🧪 Pre-registration livenerf is a small, boring, append-only benchmark for one question: does a model get worse after it ships? For months there have been reports that Anthropic "nerfs" models some days or weeks after release. That could mean quantization, a smaller model behind the same name, lower effort, or routing changes. It could also mean nothing happened and people are pattern-matching on noise. Nobody has had a clean day-0
Community take
Anthropic silently degrades models under peak load, frames it as user adaptation instead of honest overload messaging.
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ninjahawk is profiled here from public GitHub push activity.
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