The Short Version
Current official and corroborating reporting supports the stated July 19 cutoff and the $10/$50 per-million-token rates that follow. Anthropic-linked materials and multiple independent writeups distinguish Fable 5 from other Claude models whose introductory pricing caused confusion. The main caveat is timing: the post-July 19 billing step is scheduled and well-supported, but users should still recheck in case of another extension.