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Anthropic's new Claude Fable 5.1 model produced a solution to a 373-year-old cipher in 44 minutes, resolving a puzzle that had defeated cryptographers since 1653. Key Points: A 17th-century cryptogram by Sir Thomas Urquhart, unsolved since 1653, was decoded in a single sitting. The hidden text is a

Anthropic launched Claude Fable 5.1 on Sept. 1 with higher coding and science scores and an API restriction designed to block a documented model-distillation technique. Key Points: Fable 5.1 keeps $10/$50 pricing while cache reads drop 75% to $0.25 per million tokens. Anthropic reports gains in scie

An Anthropic researcher credited Claude Fable 5 with disproving an 87-year-old math conjecture, underscoring how closely Bitcoin (BTC) now tracks artificial intelligence. Key Points: An Anthropic mathematician says the company's newest model produced a counterexample to the Jacobian conjecture, open

OpenAI's new GPT-5.6 Sol model and Anthropic's Claude Fable 5 are trading benchmark wins as Fable's discounted access window closes Jul. 19. Key Points OpenAI rolled out three separate GPT-5.6 tiers, Sol, Terra and Luna, replacing its previous single-model approach. Independent testing found Claude

OpenAI's GPT-5.6 family goes public Thursday, capping a nine-day stretch that brought SpaceXAI's Grok 4.5 and Anthropic's returning Claude Fable 5, with prices spanning $1 to $50 per million tokens. Key Points: GPT-5.6 Sol, Terra and Luna reach general availability with tiered pricing from $1 to $5