Anthropic released Fable 5.2 and Mythos 5.2, which run 30% faster and cost 20% less, just as its much-watched IPO gets close.
Anthropic released two new AI models on Monday, Claude Fable 5.2 and Claude Mythos 5.2. They are faster and cheaper than the last versions. The launch comes as the company prepares for a stock market debut that could happen as soon as next week.
Anthropic calls these models its most advanced. It says they produce answers 30% faster than their predecessors. They also cost 20% less than the 5.1 generation. Pricing is $8 per million input tokens and $40 per million output tokens. Tokens are the small chunks of text an AI reads and writes, and they are how companies bill for usage.
Fable 5.2 is open to the public as of Monday. Mythos 5.2 is not. It goes only to vetted organizations through Anthropic's Life Sciences and Cyber Verification Programs. Anthropic first introduced Mythos in April and kept it limited because of its strong cybersecurity abilities. Fable arrived two months later as a public version of Mythos with extra safeguards.
These are the first top-tier models Anthropic has released since CEO Dario Amodei called in September for slowing the pace of AI development. Anthropic says the new models went through rigorous safety testing. It also built new evaluations and monitoring tools for after launch. "We called for pacing, not pausing," said Dianne Penn, the company's head of product management for research.
Anthropic is aiming for a value of $1 trillion to $1.5 trillion in its IPO, down from a $2 trillion target floated in recent months, CNBC reported. The company says it earned $33.24 billion in revenue in the nine months ended Sept. 30, up roughly 1,200% from a year earlier. Its filing also warns that safety goals compete with commercial and competitive pressure.
Most people do not need the newest model for everyday work. Penn said Fable 5.2 is meant for power users and hard, open-ended technical jobs. Claude Opus 5.5, released in September, suits daily tasks better.
The report does not say how Opus 5.5 pricing compares with Fable 5.2, so check costs before switching.
Fable 5.2 is for hard technical work; for everyday tasks, a cheaper model like Claude Opus 5.5 is still the better fit.
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