Release
Anthropic's Fab le 5.1 is live at $10/$50: new model breakdown and benchmark jump
The Brief
- Anthropic released Claude Fable 5.1 on September 1, 2026.
- The sticker price is the same as its predecessor, Fable 5, at $10/$50.
- Cache reads are 75% cheaper, and the model more than doubled Fable 5's score on an agentic scientific task benchmark.
Why it matters
Developers using Claude Fable 5 can get a newer model at the same list price, and cache-heavy workloads should see lower costs.
Who’s affected
- Teams using Claude Fable models via the Anthropic API
- Claude Fable 5.1
- Claude Fable 5
- #anthropic
- #claude
- #llm
- #pricing
- #benchmarks
- #prompt-caching
On September 1, 2026, Anthropic released Claude Fable 5.1 at the same sticker price as its predecessor. Cache reads got 75% cheaper, and on the agentic scientific task benchmark the model more than doubled Fable 5's score. Neither fact tells the whole story. A ".1" label normally…
Timeline
Claude Fable 5.1 released at unchanged price
DEV Community: ai
Anthropic's Fab le 5.1 is live at $10/$50: new model breakdown and benchmark jump