Anthropic releases Claude 5.1: 25% cheaper with zero-retention enterprise safeguards
claudeai · x · 2026-09-02
Anthropic introduces Claude Fable 5.1 and Mythos 5.1.
- Performance & Availability: Fable 5.1 is generally available, while Mythos 5.1 is for trusted access programs (cyberdefense/life sciences).
- Cost Reduction: Typical workloads cost 25% less, with highly agentic workflows saving up to 45% due to a 75% price cut on cache reads.
- Data Privacy: Enterprise Frontier Safeguards (EFS) offer complete privacy (zero-retention equivalent) by storing data in customer-controlled cloud infrastructure.
- Safety Improvements: False positives reduced by 60% in cybersecurity and fallback rates dropped 85% for basic biology/medical queries.
Related event: Anthropic Releases Fable 5.1 and Mythos 5.1 with 75% Cheaper Caching(174 posts)→
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