Nanbeige open-sources 33B reasoning model, scoring 20 on index
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Nanbeige, the foundation model team under BOSS Zhipin, releases the open-weight model Nanbeige4.3-33B. According to Artificial Analysis, the model scores 20 on Intelligence Index v5, on par with Qwen3.8 27B (xhigh), with stronger agentic use but weaker knowledge. The model is a dense 33B reasoning model released under the Apache 2.0 license with open weights, supports text input and output only, has a 524K token context window, and is small enough to run locally on a laptop. There is currently no confirmed public first-party or third-party API.
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- Artificial Analysis ArticlesFeaturedNanbeige has released Nanbeige4.3-33B scoring 20 on the Intelligence Index
Nanbeige, the foundation model research team at BOSS Zhipin (operated by Kanzhun Limited), has released Nanbeige4.3-33B, an Apache 2.0 open-weights dense reasoning model with text-only input and output and a 524K-token context window. It scores 20 on the Artificial Analysis Intelligence Index v5, matching Qwen3.8 27B (xhigh) at 20, with relative strengths in terminal use (30% on Terminal-Bench 4.0 vs. 6%) and physics reasoning (16% on CritPt v2's Hard Subset vs. 4%), but trails on AA-Briefcase v1.1 (1162 vs. 1391 Elo), FrontierCode 2.0 (11% vs. 15%) and HLE-Diamond (7% vs. 15%). It shows high abstention and low hallucination on Omniscience (18% vs. 29% hallucination rate, declining 71% of questions) and used 158K output tokens per Intelligence Index task vs. 110K for Qwen3.8 27B.
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