AnalysisAI ModelsJuly 15, 2026
User compares Sonnet 5 and Opus 4.8 across 24 tasks

In a head-to-head comparison across 24 open-source tasks at varying reasoning efforts, Sonnet 5 generally outperformed Opus 4.8. However, Opus 4.8 still leads on specific tasks, making the choice between models task-dependent.