"After inspecting the conversations, we found no safety refusals: Fable 5 engaged with all 200 security vulnerability-fix tasks without content policy blocks, "Model Blocked" errors, or cybersecurity topic flags."

WTF! I run into fallback to Opus 4.8 all the time, and I am not even doing "security Research", just normal development and debugging.

My experiences with Fable thus far have been far from 'mid-tier'. While some model releases are incremental, Fable is the same qualitative change that Opus 4.6 was compared to its predecessors. It fundamentally impacts how I work with the model. (Note: I only (well, 99%) do back-end in Python)