DeepSeek V4: official open-source release with Day-0 adaptation for Huawei Ascend

DeepSeek officially released the V4 lineup in open-source under the MIT license on April 29. It includes DeepSeek-V4-Pro at 1.6T parameters (49B active) and DeepSeek-V4 at 284B (13B active) — both MoE models with native 1M token context. The release claims roughly a 9.5x reduction in memory requirements versus V3.2 and a near-closed gap with frontier closed models on reasoning benchmarks. A defining feature of the release is optimization for Chinese accelerators: Huawei Ascend, Cambricon, Hygon, and Moore Threads completed Day-0 adaptation on release day, with multi-deploy on Ascend 950 expected in the second half of the year.