Anthropic releases Claude Fable 5.2 and Claude Mythos 5.2
Announced · Published · By Contractor AI Shop
Anthropic released Claude Fable 5.2, generally available, and Claude Mythos 5.2, limited to vetted organizations. Anthropic says they are the same underlying model, generate outputs up to 30% faster than 5.1, and cost $8 per million input tokens and $40 per million output tokens.
Key facts
- Anthropic announced Claude Fable 5.2 and Claude Mythos 5.2 on Nov 9, 2026. They are the same underlying model: Fable has cybersecurity and biology safeguards and is generally available; Mythos is available to vetted organizations through Anthropic's Life Sciences and Cyber Verification Programs. Anthropic
- Anthropic says the models generate outputs up to 30% faster than Claude Fable 5.1 and Claude Mythos 5.1, and are priced at $8 per million input tokens and $40 per million output tokens. An optional fast mode is $16 / $80 per million tokens. Anthropic
- Anthropic recommends starting with Claude Opus 5.5 for most coding and knowledge work, and stepping up to Fable or Mythos for the hardest jobs. Fable 5.2 is available on Anthropic's platform (claude-fable-5-2), Amazon Web Services, Google Cloud and Microsoft Azure. Anthropic
- CNBC (Ashley Capoot, Nov 9) and The Verge (Jay Peters, Nov 9) covered the release. Speed and price figures in this brief are Anthropic's, not independent tests. CNBC (Ashley Capoot)
Our take: what it means for contractors
A high-end hosted model, not a daily driver for estimating or email. Anthropic itself says to start with Opus 5.5 for most work and step up to Fable for the hardest jobs. What we run is unchanged: DeepSeek V4 Flash on oMLX on a Mac Studio. We have not timed Fable or Mythos.
What we don't know yet
- Real-world cost on long agent jobs
- Independent benchmark checks (published scores are Anthropic's)
Sources
- Anthropic · Introducing Claude Fable 5.2 and Claude Mythos 5.2 · 2026-11-09 · Primary
- CNBC (Ashley Capoot) · Anthropic releases Claude Fable 5.2 and Claude Mythos 5.2 ahead of IPO · 2026-11-09 · Secondary
- The Verge (Jay Peters) · Anthropic launches new Claude Fable and Mythos 5.2 models · 2026-11-09 · Secondary