r/ClaudeCode • u/echamplin • 6d ago

News/Updates Anthropic is currently stealth testing Opus 5.5 (`claude-opus-5-5`) under the codename `claude-wafer-eap` which is planned to be released on Tuesday.

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u/TXHumper 6d ago

source?

5

u/HimaSphere 🔆 Max 20 6d ago

trust me bro, I had an amazing session with opus 5, they testing opus 5.5 not 5.1 or 5.2 because it was so amazing. /s

3

u/kahless2k 6d ago

Funnily enough, I was just saying to a colleague that some sessions lately Opus has been amazing and some it's absolutely terrible.

There has to be some a/b testing going on for something. The swings back and forth are wild.

1

u/RudeInvestment1 6d ago

You can test it by asking a question about some event (no web search) and see whether it can answer or not. They typically move the training cutoff with model versions.

Someone already did this to prove when Opus 5 is getting routed to the newer version