Hands-on review: Claude Fable 5.1 matches Opus at lower cost with prompt cache savings
every · x · 2026-09-02
A hands-on review of Claude Fable 5.1 offers specific usage tips and performance metrics:
- Cost Efficiency: Try Fable 5.1 at "low effort"; it is often competitive with Opus and Sonnet on cost per task while scoring higher.
- Benchmark: On CursorBench 3.2.0, Fable 5.1 at low effort achieves parity with Fable 5 at high effort at a third of the cost.
- Caching: Prompt cache reads are 4x cheaper, dropping from $1.00 to $0.25 per million tokens for cache hits.
Related event: Claude Fable 5.1 Low-Effort Mode Matches Opus at Lower Cost(2 posts)→
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