2 September 2026
Anthropic releases cheaper, less restrictive Claude Fable 5.1
First reported
AI Breakfast, TechCrunch and 3 others ran this on , a day before the other 4 sources picked it up.
- Claude Fable 5.1 costs about 25 percent less for typical work and up to 45 percent less for complex autonomous tasks, primarily through reduced pricing on cached data.
- Safety filters are less aggressive: cybersecurity false positives dropped 60 percent and biology-related false positives dropped 85 percent compared to prior versions.
Where they differ
Reported by The Verge, VentureBeat, The Decoder, TechCrunch