Claude Sonnet 5.5 Costs More Than Opus 5.5 at the Same Score
Claude Sonnet 5.5 lists at half Opus 5.5's token price, but Artificial Analysis measured it at $7.60 per task at max effort against $3.46 for Opus at xhigh for the same score. It saves money only at low and high effort, and five breaking changes sit behind the model-ID swap.
September 28, 2026 · 10 min read