#Opus 4 articles

Claude 4 Performance Comparison | Opus 4 & Sonnet 4 Benchmarks and Pricing

A detailed comparison of Claude 4's Opus 4 and Sonnet 4 performance and how to choose between them. Covers the close contest on SWE-bench Verified (72.7% vs 72.5%), the 5x pricing difference ($3/$15 vs $15/$75), and selection criteria based on use cases where Opus 4's up to 7-hour continuous operation makes a difference.