DeepSeek V4 preview released with open weights
DeepSeek released DeepSeek-V4-Pro (1.6T total, 49B active parameters) and DeepSeek-V4-Flash (284B total, 13B active) as open weights and on its API, with a 1M context window as the default.
Source
"DeepSeek-V4 Preview is officially live & open-sourced!"
Published