DeepSeek’s September 10, 2026 release of V4.1-Flash established the current baseline for the next iteration in the series. The 552B MoE model introduced a Causal Encoder-Decoder architecture with native multimodal support, 1M-token context, and asymmetric activation (8B input / 16B output parameters), delivering benchmark gains over the prior V4-Pro while lowering inference costs. It immediately replaced V4-Flash on the API (now routed via deepseek-flash) and accelerated the company’s IPO preparations on Shanghai’s STAR Market. Release cadence has averaged roughly one major Flash update every 4–8 weeks since the V4 preview in April, with V4.1-Pro now signaled as the logical follow-on. Traders are watching for official timelines, new capability demonstrations, or competitive responses from other labs that could accelerate or delay the subsequent Flash variant.