11
Anthropic kneecaps the capability of its frontier model to prevent local and Chinese LLM improvement
(hexbear.net)
However, during the model’s training, we took steps to limit advances in the specific research capabilities that could most directly accelerate AI development. Thus, in relevant areas, including accelerator kernel optimization and improving large language model architectures, Fable 5.2 and Claude Mythos 5.2 perform at about the level of Opus 5.5.
https://www.youtube.com/watch?v=p7YYpnk14VU