DeepSeek V4 Pro 0813 goes GA, live and cheap — but its agent claims remain vendor-reported

DeepSeek's V4 Pro flagship has reached general availability as build DeepSeek-V4-Pro-0813, listed on the company's own pricing page and routed by OpenRouter as of 12 August 2026. The price is the headline: DeepSeek lists input at $0.435 per million tokens on a cache miss, $0.003625 per million on a cache hit, and output at $0.87 per million, all USD — a blended cost kingy.ai calculates at roughly…