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TechCrunch
Anthropic's new Fable release is cheaper, less restrictive
Anthropic introduces Fable and Mythos 5.1, advanced AI models with enhanced capabilities and reduced token costs. The zero data retention approach allows clients to deploy models on their infrastructure while retaining control over monitoring practices. This marks a significant shift in client privacy and data security, promising a more secure environment for enterprise users. The models also achieved high benchmark scores, reflecting their advanced performance, although slight regressions in behavior have been noted.
MonitorConfidence: HighShort term horizon
Published 1 Sept 2026, 20:40 UTC2 min read
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Summary
TL;DR
- Release of Fable and Mythos 5.1 by Anthropic
- Zero data retention enables deployment on client infrastructure
- Enhanced performance with reduced token costs
- New privacy service called Enterprise Frontier Safeguards
- Models set records in various AI benchmarks
Interesting facts
- Anthropic's commitment to never train on enterprise data without explicit permission
- Implementation of a high-privacy service previously unavailable
- Mythos 5.1 shows a regression in alignment compared to earlier models