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Applied AI·November 9, 2026·1 min read

Anthropic releases Mythos 5.2 and Fable 5.2, saying they are "best for the most ambitious, open-ended technical work", for $8/1M input and $40/1M output tokens

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Pricing Mythos and Fable 5.2 at $8/1M input and $40/1M output makes ‘ambitious, open-ended technical work’ a budgetable line item, not an experiment. If you run high-value R&D or quant workflows, it’s time to compare these economics against headcount and legacy tooling, not just other models.

Applied AI

Anthropic says during prerelease testing Mythos 5.2 and Fable 5.2 formalized the proof of Fermat's Last Theorem and solved two open black hole physics problems

If these claims hold up under peer review, we’re crossing from “assistive” to “frontier-contributing” models in math and physics. For R&D orgs, the question shifts from ‘can AI help us write papers’ to ‘how do we operationalize AI as a co-author on unsolved problems without breaking our validation culture.’