DeepSeek-V3.1
DeepSeek · 2025-08-21 · 684.5B parameters
DeepSeek-V3.1 is DeepSeek's open-weight MoE model (marketed as 671B total with 37B active parameters) released August 21, 2025, introducing a hybrid reasoning architecture that switches between a fast Non-Thinking mode and a chain-of-thought Thinking mode via chat template. It also adds enhanced tool-use and agent capabilities with support for 128K-token context, under the MIT license.