Anthropic releases Claude Fable 5.2 and Mythos 5.2 with 30% faster output and API price cuts

Anthropic released Claude Fable 5.2 and Claude Mythos 5.2, with Fable 5.2 scoring 65 on the Artificial Analysis Intelligence Index and priced at $8 per million input tokens and $40 per million output tokens. The models generate output up to 30% faster than prior versions and include an optional fast mode that speeds token generation by up to 2.5 times. During prerelease testing, the models designed three working electronic devices from scratch and solved two open problems in black hole physics.