Since Mythos’s announcement in April, everyone from LLM power user Discords to the federal government have been itching to get their hands on it. And now, (a slightly weakened version of) it is here.
The model is state-of-the-art on coding benchmarks like SWE-Bench and, and early reviews from companies including Every, Replit and Figma have high praise for its agentic coding abilities.
The larger implications of Fable’s apparent step-change in model functionality won’t be known for some time. To justify its pricing — twice that of Claude Opus 4.8 — it will have to deliver. As usual, though, Anthropic seems more worried about keeping pace with demand for the model.
A more important question is whether the model’s guardrails actually work as intended. This year, a hacker jailbroke a previous Claude model to hack a trove of Mexican government data. Anthropic says its new guardrails are quite cautious, and that red-teaming has found “no universal jailbreaks” of Claude Fable 5.
But these are early days.
#DANK MEMES
