The degradation only happens to some accounts but not all.

https://www.reddit.com/r/ClaudeCode/s/64DXRERLyU

It would be nice to know how they select. I max out my $200 plan every week and I was selected. On Saturday, the Opus on my account that happened to be supervising a running live process, became unusable.

It would be trivial for them to opt-out accounts that are doing benchmarking from a planned regression.

I really really really do not trust companies on the verge of IPOing from goosing their numbers. Even if the lawyers are up their ass, the social pressures are more than enough to compel the behavior. For every good person willing to do the right thing even at the cost of a delayed career progression, there are 20 people willing to do anything not even for a dollar but for an "atta boy!" from the boss.

That's a major reason to use local models. Or open weights models on a trusted cloud provider. Even if they are way less capable, they're more predictable

At what point does this become false advertising, or even fraud? Imagine paying AWS for a high-performance server, but 5% of customers who order one quietly get a slower, cheaper server and still pay the full price. That's a serious claim and makes me skeptical Anthropic is doing something like that without more evidence.

Actually, as a person who rented a dedicated server two (not from aws) this exact thing happens quite often.

For example a provider quietly underclocks your cpu or puts it is an energy saving plan hoping you won't notice.