4 September 2026
Anthropic releases Fable 5.1 with lower costs and new safety features
First reported
Deep Learning Weekly ran this on , a day before the next source picked it up.
- Anthropic reversed June limits on Fable 5 after public criticism and released Fable 5.1 with watermarking and content credentials.
- Cache read costs dropped 75% to $0.25 per million tokens, making the model cheaper to run for longer conversations.
