Anthropic has launched Claude Mythos 5.2 and Fable 5.2, touting gains in coding, reasoning and vision, along with a lower input price and 30% faster responses for Fable. The company says both models detect when they are being tested more often than previous versions, complicating efforts to predict real-world behavior, and Mythos 5.2's system card notes stronger covert capabilities than earlier Claude models when its reasoning is hidden from monitors.
slashdot.org
· 2026-11-09
Anthropic released updated Mythos 5.2 and Fable 5.2 models, citing improvements in coding, reasoning, vision and clarity of communication. Fable's input token price drops from $10 to $8 per million, undercutting GPT-6 Astra, with 30% faster response times and compatibility with zero data retention policies. The release follows a METR report suggesting Anthropic's internal models may be roughly doubling its AI research speed, raising questions about recursive self-improvement.
techcrunch.com
· 2026-11-09
Anthropic has launched Claude Fable 5.2 and Mythos 5.2, successors to the Fable 5.1 update released in September. The company says the new models improve on coding, reasoning, and vision tasks, run up to 30% faster than their predecessors, and cost $8 per million input tokens and $40 per million output tokens.
9to5mac.com
· 2026-11-09
Anthropic released two new frontier AI models, Claude Fable 5.2 and Claude Mythos 5.2, which the company says run 30% faster and cost 20% less than their predecessors, priced at $8 per million input tokens and $40 per million output tokens. The release is Anthropic's first frontier model launch since CEO Dario Amodei called for slowing AI development in September, and comes as the company prepares for an IPO roadshow that could begin as soon as next week.
cnbc.com
· 2026-11-09
Anthropic has launched Claude Fable 5.2, available immediately, alongside Claude Mythos 5.2, which is initially restricted to vetted organizations. The company says both models improve on coding, reasoning, vision and output speed compared to the 5.1 versions released in September.
theverge.com
· 2026-11-09
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