>In a world where things such as GLM-5.3, DeepSeek-V4-Pro-0813, and Kimi-K3 exists, this is a bit laughable.

This is not just for security, too. Using Fable for anything that could be remotely construed as being connect to chemistry or biology was impossible until a few weeks ago. Now it is slightly better, but still fails on many completely innocuous projects.

So as other models advance, Anthropic's sole frontier offering to entire academic fields remains an Opus that seems to get worse in capability each release. They're starting to become a joke in my field: at a conference a few weeks ago, one presenter laughed when I asked about his use of Fable and pointed out that it would downgrade if the letters 'd', 'n', and 'a' were anywhere near each other, which is not that far from my experience.