DeepSeek's V4.1 Flash launch on September 10, 2026, introduced the smallest model in a new architecture family with native image input and strong agentic performance, while explicitly noting that V4 Pro API requests would route to it temporarily “until V4.1-Pro launches.” As of early October 2026, no V4.1 Pro has appeared on pricing pages, changelogs, or Hugging Face, leaving V4 Pro 0813 (August 13 GA) and V4.1 Flash as the active offerings. The lab’s rapid cadence—roughly every 20–60 days—combined with ongoing $12 billion fundraising, Huawei Ascend tooling partnerships, and competition from Moonshot, Zhipu, and others keeps expectations high for an imminent flagship Pro update focused on agent workflows and 1M-token context. Traders watch for official announcements or benchmark leaks that could clarify the timeline.