DeepSeek V3.1 Terminus is an AI model released by DeepSeek on Sep 22 2025, 32 days after DeepSeek V3.1. It is the 16th tracked release from DeepSeek out of 18 total. It is an open-source / open-weight model.
About DeepSeek: Chinese AI lab known for efficient, open-weight models. Gained attention for strong performance at lower cost.