DeepSeek V4 Flash 0731 vs Claude Opus 5.5

DeepSeek V4 Flash 0731Claude Opus 5.5
Performance scoreNot in Arena’s top ranks1504 pts (#3)
Usage · 7 days5.53T tokens (#8)3.37T tokens (#9)
Output price$1.32 per 1M tokens$20 per 1M tokens
Input price$0.44 per 1M tokens$4 per 1M tokens
Context length1.05M tokens1M tokens
ReleasedJul 31, 2026Sep 22, 2026

Source: OpenRouter (usage Oct 1 – 7 · prices), Arena (performance · quality) · CC BY 4.0. Prices are converted at fixed exchange rates.