Claude 3.5 Opus is no longer mentioned at all on https://docs.anthropic.com/en/docs/about-claude/models
Internet Archive confirms that on the 8th of October that page listed 3.5 Opus as coming "Later this year" https://web.archive.org/web/20241008222204/https://docs.anth...
The fact that it's no longer listed suggests that its release has at least been delayed for an unpredictable amount of time, or maybe even cancelled.
Before anyone reads too much into this, here's what an Anthropic staff said on Discord:
> i don't write the docs, no clue
> afaik opus plan same as its ever been
Maybe he's not high level enough employee to have any say in the product roadmap, and he's behind on leadership planning?
It's possible that they've determined that Opus no longer makes sense if they're able to focus on continuously optimising Sonnet. That said, Anthropic have been relatively good at setting and managing expectations, so today would have been a good time to make that clear.
Or maybe they released it