DeepSeek released the official version of its DeepSeek-V4-Flash model on July 31, 2026, introducing significantly enhanced autonomous agent capabilities and further reducing API costs. The update, published in the company’s developer documentation, arrived slightly behind its mid-July target and without the highly anticipated V4-Pro iteration. DeepSeek stated that the Flash model’s architecture remains identical to its April preview, with performance gains driven entirely by extensive post-training.