I asked Fable 5.1 (Extra) to review the complaints on hackernews, it scanned everything and then came up with some benign (but scary sounding) prompts that used to get blocked on 5.0. I asked it to give results and it happily answered the bio/cyber prompts - hardened a Dockerfile, did seccomp, found a command injection in its own snippet, etc. Nothing was blocked.

Then i went and pasted those exact prompts it generated into a fresh chat, 5.1 on max effort.

Immediately got blocked and sent to Opus 4.8 fallback.