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
Claude Fable 5.2 (Max, Default Fallback) achieved a score of 65 on the Artificial Analysis Intelligence Index, well above the comparable median of 40. The model supports text and image input with text output and a 1M token context window, but testing showed it used 275M tokens versus a 72.8M median, took 45 minutes per task against a 12.9 minute median, and cost $26.54 per task to evaluate. Input pricing is $8.00 per 1M tokens and output pricing is $40.00 per 1M tokens, both well above typical rates.
artificialanalysis.ai
· 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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