#opus-4-5 articles

What Is Claude Opus 4.5 | 76% Token Reduction Compared to Sonnet 4.5 Explained

A breakdown of Claude Opus 4.5's capabilities and pricing. At $5 input / $25 output — Sonnet-level pricing — it delivers roughly 67% cost reduction over Opus 4.1, and at medium Effort achieves Sonnet 4.5-equivalent accuracy with 76% fewer tokens. Covers how to use the Effort parameter and how to leverage prompt caching and batch inference.