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Chuxin-1.6B-1M is an open-source 1.6-billion-parameter language model built entirely from open-source data and trained to perform competitively on downstream tasks. The 1M-window variant demonstrates strong contextual retrieval capabilities, demonstrated by needle-in-a-haystack experiments. The project provides quickstart code and evaluation benchmarks and is described in the CHUXIN: 1.6B technical report.
AI named ChuXin in January 2026.