Cogito v2.1 671B
Deep Cogito · 2025-11-19 · 671B parameters
Cogito v2.1 671B is Deep Cogito's open-weight, 671B-parameter Mixture-of-Experts instruction model, released on November 19, 2025. Built by post-training DeepSeek-V3-Base, it uses Iterated Distillation and Amplification (IDA) and process supervision over reasoning chains. It is a hybrid model that can answer directly or self-reflect, is optimized for coding, STEM, instruction following, general helpfulness, and tool calling, and supports a 128K-token context window while being trained in more than 30 languages.