Anthropic Fable 5.1 Watermark Skips Code Tokens

The New Stack post covers Anthropic's Fable 5.1 release. Its watermarking system marks text tokens for later detection yet leaves code tokens unmarked because including them risks breaking accuracy on programming tasks. The same update adds an API restriction aimed at limiting large-scale model distillation. Visible discussion among replies highlights the resulting blind spot for developers who work with generated code. The source summary confirms the watermark targets text only and the API change addresses distillation.