# Anthropic releases new AI models ahead of IPO

> Anthropic launches Claude Fable 5.2 and Claude Mythos 5.2, its first frontier models since CEO called for AI development slowdown, as company prepares for blockbuster IPO.
- Title: Anthropic releases new AI models ahead of IPO · CNBC
- Summary: Anthropic launches Claude Fable 5.2 and Claude Mythos 5.2, its first frontier models since CEO called for AI development slowdown, as company prepares for…
- Keywords: anthropic, claude fable 5.2, claude mythos 5.2, dario amodei, ai models, ipo, frontier models, CNBC
- Source: CNBC — https://cnbc.com/2026/11/09/anthropic-claude-fable-5-2-mythos-5-2.html
- Author: Ashley Capoot
- Published: 2026-11-09T19:00:01+00:00
- Read time: 1 min
- Topics: anthropic, claude fable 5.2, claude mythos 5.2, dario amodei, ai models, ipo, frontier models, business, finance
## Anthropic launches two new models
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on Monday as the company prepares for a potentially historic IPO that could take place as soon as next week.
## Models are faster and cheaper
Fable 5.2 and Mythos 5.2 generate outputs 30% faster than their predecessors and cost 20% less. They are available for eight dollars per million input tokens and forty dollars per million output tokens.
## First frontier models since slowdown call
The launch marks the first time Anthropic has released frontier models since CEO Dario Amodei called to slow down the pace of AI development in September.
## Balancing safety with commercial pressure
Anthropic must balance safety efforts with intense commercial and competitive pressures, a tension the company highlighted in its prospectus. Dianne Penn, head of product management for research, said: we called for pacing, not pausing.

> We called for pacing, not pausing
## Valuation target lowered for IPO
Anthropic is aiming for a valuation of one trillion to one point five trillion dollars in its IPO offering, down from a target of two trillion dollars that had been floated in recent months.
## Fable 5.2 targets complex technical work
Fable 5.2 is primarily intended for power users and power use cases, excelling at complex, open-ended technical work in engineering, mathematics and robotics. Other models like Claude Opus 5.5 are better suited for daily tasks.
## Key takeaway

Anthropic released two advanced AI models generating outputs 30% faster and costing 20% less than predecessors, marking its first frontier model launch since CEO Dario Amodei called for slowing AI development.