Claude Fable 5.2
Claude Fable 5.2 is Anthropic’s model for demanding technical work, introduced on November 9, 2026.
At a glance
| Documented milestone | Nov 9, 2026 |
|---|---|
| Context window | 1,000,000 tokens |
| Input / output | Text and image input; text output |
| Open weights | Not verified |
| API text price | $8 input / $40 output per 1M tokens. Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. |
What changed
Anthropic says Fable 5.2 improves coding, reasoning and vision over Fable 5.1, with faster output and a lower standard token price. Fable and the access-controlled Mythos version share an underlying model but have different safeguards and access conditions. We have not independently reproduced their evaluations.
Who it's for
Consider it for difficult, open-ended technical or scientific tasks where the added model cost is justified. For routine work, Anthropic recommends starting with a smaller member of its model family and escalating when needed.
How to try it
Use Anthropic’s Claude platform and consult the official announcement for current access. Mythos is subject to a separate verification process; Fable access does not imply Mythos access.
What it costs
Anthropic API: $8 input / $40 output per 1M text tokens. Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge.
Optional fast mode, caching and other processing options have separate terms.
Documented events
Sources
- Anthropic: Introducing Claude Fable 5.2 and Mythos 5.2 · checked Nov 11, 2026
- Anthropic Claude API pricing · checked Nov 11, 2026
- Anthropic model specifications: Claude Fable 5.2 · checked Nov 11, 2026
Prices and availability can change. We report vendor documentation; we have not independently benchmarked these models.