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Simon Willison

The Wayback Machine came back long enough for me to snap this screenshot, confirming that Claude 3.5 Opus was listed as "Later this year" on Anthropic's models page a few weeks ago but is no longer mentioned at all

web.archive.org/web/2024093012 compared to docs.anthropic.com/en/docs/abo

Internet Archive capture of the Claude models page - shows both Claude 3.5 Haiku and Claude 3.5 Opus as "Later this year"
That same page today shows Claude 3.5 Haiku as later this year but no longer mentions Claude 3.5 Opus at all
4 comments
Jeff Triplett

@simon They still have a chart up here docs.anthropic.com/en/docs/res

I don't see anything out of line with the upcoming Opus version being their best (and more expensive) model. Especially given their recent release history.

I don't mind minor revisions to the existing model if it means my previous prompts work better than before.

I definitely see your point, though.

Quinn Comendant

@simon My conspiracy theory is that the new Sonnet is actually Opus, and they're squeezing all the juice they can out of investors believing something even better is coming soon.

Simon Willison

@com some kind of investor-related shenanigans does seem possible - but the fact that they've deleted Opus 3.5 entirely from the "coming soon" section makes me think maybe they just had a bad training run and found the model unusable after testing it

(Or maybe it was found to be "unsafe" - that's not impossible given how Anthropic roll)

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