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Nanbeige4.1 3B

Nanbeige4.1-3B is described as a post-trained upgrade over Nanbeige4-3B variants using SFT and RL, targeting robust reasoning and long-horizon agent behavior, including sustained deep-search style tool interaction at small scale.
New Text Gen 7
Released: February 13, 2026

Overview

Nanbeige4.1-3B is a 3B-parameter reasoning model optimized to combine strong multi-step reasoning, preference alignment, and agentic tool use in a compact size.

About Nanbeige LLM Lab

Nanbeige (Chinese: 南北阁, which means "South and North Pavilion") is a large language model (LLM) research team from BOSS Zhipin.

Location: Bejing, CN
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Tools using Nanbeige4.1 3B

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Last updated: February 27, 2026
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