Motion for AI researchers: DO NOT evaluate and report results on Fable 5 models.
Closeness hurts science, and gated access will further destroy it. Embrace open source models.
When Fable 5 is used for frontier LLM development, it does not notify the user and instead limits the model’s capabilities through methods such as prompt modification, steering vectors, and PEFT.
Anthropic estimated that this would affect approximately 0.03% of traffic.