Nanbeige4 Models by Nanbeige LLM Lab
Nanbeige LLM LabChina
2 models2025–2026Up to 256k ctx
Capabilities
ReasoningAll models
Function Calling1 of 2 models
Tool Use1 of 2 models
About
Nanbeige4 is the fourth-generation model series from Nanbeige LLM Lab (BOSS Zhipin / Kanzhun Limited). Characterized by strong reasoning at small scale: 3B parameters pre-trained on 23 trillion tokens (Nanbeige4-3B), and the enhanced Nanbeige4.1-3B with 256K context and agentic capabilities. Both models are open-source and available on HuggingFace.
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
2 in view
Nanbeige4.1-3BCurrent
Use when the workload needs 256k context, 4B parameters, and reasoning.
2026-02256k context4B parametersreasoning
Nanbeige4-3BCurrent
Use when the workload needs 64k context, 3B parameters, and reasoning.
2025-1264k context3B parametersreasoning
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Nanbeige4.1-3B | Use when the workload needs 256k context, 4B parameters, and reasoning. | 2026-02 | 256k context4B parametersreasoning | Current |
| Nanbeige4-3B | Use when the workload needs 64k context, 3B parameters, and reasoning. | 2025-12 | 64k context3B parametersreasoning | Current |
Release Timeline
2 release groups2026-02
1 current
Nanbeige4.1-3B
Current256k context4B parametersreasoning
2025-12
1 current
Nanbeige4-3B
Current64k context3B parametersreasoning
Specifications(2 models)
| Model | Released | Context | Parameters | Reasoning | Fn Calling | Tool Use |
|---|---|---|---|---|---|---|
| Nanbeige4.1-3B | 2026-02 | 256k | 4B | Yes | Yes | Yes |
| Nanbeige4-3B | 2025-12 | 64k | 3B | Yes | No | No |
Frequently Asked Questions
- What is Nanbeige4 used for?
- Nanbeige4 is used for china, reasoning, and agent workflows and tool use. The family description and listed model capabilities point to those workloads as the best fit.
- How does Nanbeige4 compare to SenseNova U1?
- Nanbeige4 by Nanbeige LLM Lab is strongest where you need china, while SenseNova U1 by SenseTime is the closest related family to check for china. Nanbeige4 has 2 listed variants and reaches up to 256k context, so compare the specs and pricing tables before choosing a production model.
- Which Nanbeige4 model should I use?
- If price is the main constraint, use the pricing table first because Nanbeige4 does not have complete provider pricing in the local data. For the most capable/latest local choice, evaluate Nanbeige4.1-3B with 256k context and reasoning, tool use, and function calling.
