Claude Sonnet 4.6 Is Here — Newer Training Data Than Opus? A Three-Way Comparison to Help You Choose

Claude Sonnet 4.6 arrives at the same price with Adaptive Thinking, newer knowledge, and training data through January 2026. This comparison helps choose between Sonnet 4.6, Sonnet 4.5, and Opus 4.6 across price, speed, context, freshness, and use case.