Anthropic releases first frontier models since Amodei’s call for slowdown as IPO buzz builds

Anthropic released Claude Fable 5.2 and Claude Mythos 5.2, its most advanced AI models, as it prepares for a possible IPO as soon as next week. The launch is its first release of frontier models since chief executive Dario Amodei called for a slower pace of AI development in September, highlighting the company’s effort to balance safety with commercial competition.

Anthropic says the models produce outputs 30% faster and cost 20% less than the 5.1 generation, with prices of $8 per million input tokens and $40 per million output tokens. The company says they underwent safety and alignment testing and will be monitored after launch. As executives prepare to meet investors, Anthropic is reportedly targeting an IPO valuation of $1 trillion to $1.5 trillion, below the $2 trillion figure discussed in recent months.