Jan-v1 is the first release in the
Jan Family, designed for agentic reasoning and problem-solving within the
Jan App. Based on our
Lucy model, Jan-v1 achieves improved performance through model scaling.
Jan-v1 uses the
Qwen3-4B-thinking model to provide enhanced reasoning capabilities and tool utilization. This architecture delivers better performance on complex agentic tasks.
For question-answering, Jan-v1 shows a significant performance gain from model scaling, achieving 91.1% accuracy.
These benchmarks evaluate the model's conversational and instructional capabilities.
Jan-v1 is optimized for direct integration with the
Jan App. Simply select the model from the Jan App interface for immediate access to its full capabilities.
1vllm serve janhq/Jan-v1-4B \
2 --host 0.0.0.0 \
3 --port 1234 \
4 --enable-auto-tool-choice \
5 --tool-call-parser hermes
6
1llama-server --model Jan-v1-4B-Q4_K_M.gguf \
2 --host 0.0.0.0 \
3 --port 1234 \
4 --jinja \
5 --no-context-shift
1temperature: 0.6
2top_p: 0.95
3top_k: 20
4min_p: 0.0
5max_tokens: 2048
