Anthropic releases Mythos 5.2 and Fable 5.2, raising concerns about recursive self-improvement

Anthropic releases new Mythos and Fable models amid RSI concerns

Anthropic released Mythos 5.2 and Fable 5.2 on Monday, citing gains in coding, reasoning, vision and communication. Fable's input price drops from $10 to $8 per million tokens, responses are 30% faster at every effort level, and Enterprise Frontier Safeguards support zero data retention (ZDR).

Why it matters: Fable's input price falls from $10 to $8 per million tokens, making Fable 5.2 cheaper than main rival GPT-6 Astra.