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Figure 29: Nanbeige 4.1 3B · diagram by Sebastian Raschka · click to zoom
DenseBOSS Zhipin 🇨🇳 · February 10, 2026

Nanbeige 4.1 (3B)

Small on-device oriented model that stays close to Llama 3.2 while nudging the scaling choices.

Key detail

Llama-like stack without tying input embeddings to the output layer.

Parameters

3B

Context

256K

KV / token

64 KiB

Fact sheet

Scale
3B parameters
Context window
262,144 tokens
Decoder type
Dense
Attention
GQA
Layer mix
32 GQA
KV cache / token (bf16)
64 KiB · Low
License
Apache License 2.0
Released

Efficiency

Parameters active per token

100%

Dense: every weight runs for every token.

KV cache per token (bf16)

64 KiB

Smaller than 62% of models in the atlas. How it’s calculated

AA Intelligence Index v4.3.2

Source

8.4

Scientific
5.4

Architecture concepts

Use the ← and → keys to step through releases.

Similar architectures

  • Architecture diagram of SmolLM3 (3B)

    Hugging Face, released 2025-06-19. Dense decoder, 3B parameters, 128K context. Attention: GQA with periodic NoPE layers.

  • Architecture diagram of Llama 3.2 (3B)

    Meta, released 2024-09-25. Dense decoder, 3B parameters, 128K context. Attention: GQA.

  • Architecture diagram of VibeThinker-3B (3B)

    Weibo, released 2026-06-15. Dense decoder, 3B parameters, 128K context. Attention: 8:1 GQA with RoPE.

  • Architecture diagram of Tiny Aya (3.35B)

    Cohere, released 2026-02-13. Dense decoder, 3.4B parameters, 8K context. Attention: GQA with 3:1 sliding-window attention.

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