Anthropic Ships Fable 5.1 and Restricted Mythos 5.1 with Cheaper Tokens, Fewer False Refusals, and Zero Data Retention
Anthropic released Fable 5.1 and the partner-restricted Mythos 5.1, adding performance gains, lower token costs, and fewer false-positive safety refusals, plus a Zero Data Retention option (Enterprise Frontier Safeguards...