DeepSeek-V3.1-Terminus
DeepSeek · 2025-09-22 · 684.5B parameters
DeepSeek-V3.1-Terminus is an open-weight update to DeepSeek-V3.1, released September 22, 2025, that maintains the earlier model's capabilities while improving output stability. DeepSeek reports fewer Chinese-English mix-ups and abnormal characters, together with further optimization of Code Agent and Search Agent performance. It retains V3.1's chat-template-selectable thinking and non-thinking modes and documented 128K-token context.