Qwen3.5-4B-RAG-Specialist

Qwen3.5-4B-RAG-Specialist is a post-trained version of Qwen/Qwen3.5-4B, fine-tuned specifically for Retrieval-Augmented Generation (RAG) pipelines.

The model is optimized for:

  • Precise answer extraction strictly grounded in the provided context passages.
  • Hallucination mitigation (explicit refusal to answer when the required information is absent from the context).
  • Accurate source attribution/citation and resilience against noisy or irrelevant distractor documents.

Model Details

  • Developed by: [Your Name / Organization]
  • Model Type: Causal Language Model
  • Base Model: Qwen/Qwen3.5-4B
  • Parameters: ~4 Billion
  • Context Length: Supports up to 32k/128k tokens (inherited from the Qwen base architecture)
  • Language(s): English, Italian (multilingual capabilities inherited from base)
  • License: Apache-2.0

Intended Use & Best Practices

Intended Use

  • Retrieval-Augmented Generation (RAG) in enterprise or local deployments.
  • Question Answering over internal documentation, manuals, and reports.
  • Synthesis of heterogeneous document contexts containing distractor/irrelevant passages.

Recommended Prompt Template

The model performs best when prompts adhere to the standard Qwen ChatML format:

<|im_start|>system
You are an assistant specialized in RAG. Answer the user's question based EXCLUSIVELY on the passages provided in [Context]. If the information is missing or insufficient, state clearly that you cannot answer.<|im_end|>
<|im_start|>user
[Context]
Document [1]: Project Chronos was initiated in May 2024 to modernize the internal storage network.
Document [2]: Peripheral server maintenance takes place on the first Tuesday of every month.

[Question]
When did Project Chronos start?
[Answer]<|im_end|>
<|im_start|>assistant
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