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license: apache-2.0
language:
- en
base_model:
- janhq/Jan-code-4b
pipeline_tag: text-generation
library_name: transformers
tags:
- agent
---
# Jan-Code-4B: a small code-tuned model
[](https://github.com/janhq/jan)
[](https://opensource.org/licenses/Apache-2.0)
[](https://jan.ai/)

## Overview
**Jan-Code-4B** is a **code-tuned** model built on top of [Jan-v3-4B-base-instruct](https://huggingface.co/janhq/Jan-v3-4B-base-instruct). It’s designed to be a practical coding model you can run locally and iterate on quickly—useful for everyday code tasks and as a lightweight “worker” model in agentic workflows.
Compared to larger coding models, Jan-Code focuses on handling **well-scoped subtasks** reliably while keeping latency and compute requirements small.
## Intended Use
* **Lightweight coding assistant** for generation, editing, refactoring, and debugging
* **A small, fast worker model** for agent setups (e.g., as a sub-agent that produces patches/tests while a larger model plans)
* **Replace Haiku model in Claude Code setup**
## Quick Start
### Integration with Jan Apps
Jan-code is optimized for direct integration with [Jan Desktop](https://jan.ai/), select the model in the app to start using it.
### Local Deployment
**Using vLLM:**
```bash
vllm serve janhq/Jan-code-4b \
--host 0.0.0.0 \
--port 1234 \
--enable-auto-tool-choice \
--tool-call-parser hermes
```
**Using llama.cpp:**
```bash
llama-server --model Jan-code-4b-Q8_0.gguf \
--host 0.0.0.0 \
--port 1234 \
--jinja \
--no-context-shift
```
### Recommended Parameters
For optimal performance in agentic and general tasks, we recommend the following inference parameters:
```yaml
temperature: 0.7
top_p: 0.8
top_k: 20
```
## 🤝 Community & Support
- **Discussions**: [Hugging Face Community](https://huggingface.co/janhq/Jan-code/discussions)
- **Jan App**: Learn more about the Jan App at [jan.ai](https://jan.ai/)
## 📄 Citation
```bibtex
Updated Soon
```
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