license, language, base_model, pipeline_tag

license	language	base_model	pipeline_tag
apache-2.0	en	Qwen/Qwen3-4B-Thinking-2507	text-generation

Jan-v1: Advanced Agentic Language Model

Overview

Introducing Jan-v1, the first release in the Jan Family – specifically designed for advanced agentic reasoning and complex problem-solving within the Jan App. Building on the innovative agentic capabilities of our earlier Lucy model, Jan-v1 represents a significant leap forward through strategic model scaling.

Jan-v1 leverages the newly released Qwen3-4B-thinking model to deliver significantly enhanced reasoning capabilities and effective tool utilizatio. This architectural evolution is designed to deliver superior performance on complex agentic tasks, setting a new benchmark for accessible, high-performance AI.

Performance

Question Answering (SimpleQA)

For question-answering, Jan-v1 shows a significant performance gain from model scaling, achieving 91.2% accuracy.

The 91.2% SimpleQA accuracy represents a significant milestone in factual question answering for models of this scale, demonstrating the effectiveness of our scaling and fine-tuning approach.

Chat Benchmarks

These benchmarks evaluate the model's conversational and instructional capabilities.

Benchmark	JanV1 (Ours)	Qwen3-4B-Thinking-2507	GPT-OSS-20B (High)	GPT-OSS-20B (Low)
EQBench	83.61	82.61	78.35	78.35
CreativeWriting	72.08	65.74	30.23	26.38
IFBench	Prompt: 0.3537 Instruction: 0.3910	Prompt: 0.4490 Instruction: 0.4806	Prompt: 0.5646 Instruction: 0.6000	Prompt: 0.5034 Instruction: 0.5403
ArenaHardv2	25.3	-	-	-

Quick Start

Integration with Jan App

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.

Local Deployment

Using vLLM:

vllm serve Menlo/Jan-v1 \
    --host 0.0.0.0 \
    --port 1234 \
    --enable-auto-tool-choice \
    --tool-call-parser hermes

Using llama.cpp:

llama-server --model jan-v1.gguf \
    --host 0.0.0.0 \
    --port 1234

Recommended Parameters

temperature: 0.6
top_p: 0.95
top_k: 20
min_p: 0.0
max_tokens: 2048

🤝 Community & Support

• Discussions: HuggingFace Community
• Jan App: Learn more about the Jan App at jan.ai

📄 Citation

Updated Soon

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