Anthropic releases Fable 5.2 ahead of potential IPO
Anthropic launches Fable 5.2 and Mythos 5.2
Anthropic announced the release of Claude Fable 5.2 and Claude Mythos 5.2, with its developer account saying Fable runs up to 30% faster and costs less per token than Fable 5.1. Zotpaper reports that these are Anthropic’s first frontier releases since CEO Dario Amodei called for slower development in September, and that a potential IPO could come as soon as next week. AI news aggregator MTS highlighted benchmark gains and reported that a Fermat’s Last Theorem formalization required about 1,000 Fable agents.
Claude Fable 5.2 and Claude Mythos 5.2 are available now:
Anthropic, Anthropic AI research · On XIt’s up to 30% faster than Fable 5.1, and costs $8/$40 per 1M tokens, down from $10/$50.
ClaudeDevs, Claude developer account · On XThe Fermat formalization took a team of about 1,000 Fable 5.2 agents, while Opus 5.5 was only 26% done after 18 hours
MTS, AI news aggregator · On XOur story: Anthropic launches Fable 5.2 as potential IPO nears after CEO’s slowdown call
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