DeepSeek's commanding position in the OpenRouter market stems from its V4 Flash series delivering unmatched token throughput at ultra-low cost, with the 0731 variant alone processing over 17 trillion tokens in recent weekly rankings through efficient mixture-of-experts designs optimized for high-volume agentic and coding workloads. Chinese labs have captured the majority of platform traffic for months via rapid iteration and aggressive pricing that undercuts U.S. alternatives by 60-90 percent, driving developer migration on the aggregation platform. While this creates strong trader consensus, a surprise capacity constraint, major OpenAI or Anthropic discount campaign, or sudden Tencent/Z.ai surge could still fragment share before resolution.