--- language: - en - zh license: apache-2.0 base_model: Qwen/Qwen3.5-27B tags: - unsloth - qwen - qwen3.5 - reasoning - chain-of-thought - Dense pipeline_tag: image-text-to-text datasets: - nohurry/Opus-4.6-Reasoning-3000x-filtered - Jackrong/Qwen3.5-reasoning-700x --- # 🌟 Qwen3.5-27B-Claude-4.6-Opus-Reasoning-Distilled > **Build Environment Upgrades:** > - **Fine-tuning Framework**: **Unsloth 2026.3.3** > - **Core Dependencies**: **Transformers 5.2.0** > - This model fixes the crash in the official model caused by the Jinja template not supporting the **"developer"** role. (commonly sent by modern coding agents like Claude Code and OpenCode) > - It does **not disable thinking mode by default**, and allowing the agent to run continuously for **over 9 minutes without interruption**. > - Compared to the original model, **autonomy and stability are significantly improved**. ![HB8AleUaMAArNyM](https://cdn-uploads.huggingface.co/production/uploads/66309bd090589b7c65950665/GHkMJL6I383eIwK1qj80K.jpeg) ## 💡 Model Introduction **Qwen3.5-27B-Claude-4.6-Opus-Reasoning-Distilled** is a highly capable reasoning model fine-tuned on top of the powerful Qwen3.5 architecture. The model's core directive is to leverage state-of-the-art Chain-of-Thought (CoT) distillation primarily sourced from Claude-4.6 Opus interactions. Through Supervised Fine-Tuning (SFT) focusing specifically on structured reasoning logic, this model excels in breaking down complex user problems, planning step-by-step methodologies within strictly formatted `` tags, and ultimately delivering precise, nuanced solutions. ### 🧠 Example of Learned Reasoning Scaffold（Example） The model includes targeted optimizations addressing Qwen3.5’s tendency toward excessive transitional or repetitive reasoning on simple queries. Through deep distillation and structural imitation of Claude-4.6-Opus reasoning chains, the model adopts a more efficient structured thinking pattern: **“Let me analyze this request carefully: 1..2..3...”.** This streamlined reasoning paradigm significantly reduces redundant cognitive loops while preserving deep analytical capacity, resulting in substantially improved inference efficiency. ```text Let me analyze this request carefully: 1. Identify the core objective of the problem. 2. Break the task into clearly defined subcomponents. 3. Evaluate constraints and edge cases. 4. Formulate a step-by-step solution plan. 5. Execute the reasoning sequentially and verify consistency. . . . ``` ## 🗺️ Training Pipeline Overview ```text Base Model (Qwen3.5-27B) │ ▼ Supervised Fine-Tuning (SFT) + LoRA │ ▼ Final Model (Claude-4.6-Opus-Reasoning-Distilled,text-only) ``` ## 📋 Stage Details **🔧Tool Calling Benchmark**（benchmark tests by user @Chris Klaus） ![Screenshot 2026-03-24 at 10.19.28 AM](https://cdn-uploads.huggingface.co/production/uploads/66309bd090589b7c65950665/TjfbXq5AahoMj8xZuFDig.png) > **From the test results, it is clear that different Qwen3.5 quantized models show significant differences in tool-calling capability. Among them, only the 27B model distilled with Claude Opus reasoning demonstrates stable performance.** 🔥**Community-tested advantages** (benchmark tests by user @sudoing on a single RTX 3090): Qwen3.5-27B-Claude-4.6-Opus-Reasoning-Distilled shows significant advantages in coding-agent environments such as Claude Code and OpenCode: >- **Native support for the “developer” role**, requiring no Jinja template patches or ChatML workarounds. >- **Thinking mode fully preserved** (logs confirm `thinking=1`), not silently disabled, maintaining the complete chain-of-thought reasoning process. >- **Greatly improved autonomy and stability** — capable of running continuously for **over 9 minutes autonomously** (with zero human intervention). It actively waits for tool responses, reads outputs, self-corrects errors, and can even automatically generate a README, whereas the base model often stalls or freezes mid-execution. >**Hardware usage remains unchanged:** >- About **16.5 GB VRAM** with **Q4_K_M** quantization >- **29–35 tok/s** generation speed >- **Full 262K context** with no compromises - These improvements come from successfully distilling the **structured reasoning style of Claude 4.6 Opus**, allowing Qwopus to be truly **plug-and-play in modern local coding agents** and deliver an experience close to Opus in smoothness and usability. **Thanks to the community for the in-depth testing and feedback!** ### 🔹 Supervised Fine-Tuning (SFT) - **Objective:** To inject high-density reasoning logic and establish a strict format for problem-solving involving an internal thinking state prior to outputting the final response. - **Methodology:** We utilized **Unsloth** for highly efficient memory and compute optimization. A critical component of this stage is the `train_on_responses_only` strategy, masking instructions so the loss is purely calculated over the generation of the `` sequences and the subsequent solutions. - **Format Enforcement:** All training samples were systematically normalized so the model strictly abides by the structure ` {internal reasoning} \n {final answer}`. ### 📚 All Datasets Used The dataset consists of high-quality, filtered reasoning distillation data: | Dataset Name | Description / Purpose | |--------------|-----------------------| | [nohurry/Opus-4.6-Reasoning-3000x-filtered](https://huggingface.co/datasets/nohurry/Opus-4.6-Reasoning-3000x-filtered) | Provides comprehensive Claude 4.6 Opus reasoning trajectories. | | [TeichAI/claude-4.5-opus-high-reasoning-250x](https://huggingface.co/datasets/TeichAI/claude-4.5-opus-high-reasoning-250x) | Injecting high-intensity, structured reasoning instances. | | [Jackrong/Qwen3.5-reasoning-700x](https://huggingface.co/datasets/Jackrong/Qwen3.5-reasoning-700x) | Additional curated reasoning samples designed to strengthen structured step-by-step problem solving and improve reasoning diversity. | ## 🌟 Core Skills & Capabilities 1. **Modular & Structured Thinking:** Inheriting traits from Opus-level reasoning, the model demonstrates confident parsing of the prompt, establishing an outlined plan in its `` block sequentially rather than exploratory "trial-and-error" self-doubt. ## ⚠️ Limitations & Intended Use - **Hallucination Risk:** While reasoning is strong, the model remains an autoregressive LLM; external facts provided during the thinking sequence may occasionally contain hallucinations if verifying real-world events. - **Intended Scenario:** Best suited for offline analytical tasks, coding, math, and heavy logic-dependent prompting where the user needs to transparently follow the AI's internal logic. - **Preview Version Notice:** Because this model is relatively new and intentionally lightweight, the surrounding ecosystem — including inference templates, fine-tuning pipelines, routing configurations, and tooling integrations — may not yet be fully mature or standardized. As a result, users may encounter occasional bugs, compatibility inconsistencies, or integration edge cases. The current release should be considered a preview build while the broader architectural stack and supporting utilities continue to stabilize and improve. ## 🙏 Acknowledgements Significant thanks to the [Unsloth AI](https://unsloth.ai/) team for making rapid fine-tuning of MoE and large LLM models accessible. Additionally, we acknowledge Qwen internally, and the open-source community developers producing exceptional distilled datasets (`nohurry` and `TeichAI`). ## 📖 Citation If you use this model in your research or projects, please cite: ```bibtex @misc{jackrong_qwen35_opus_distilled, title = {Qwen3.5-27B-Claude-4.6-Opus-Reasoning-Distilled}, author = {Jackrong}, year = {2026}, publisher = {Hugging Face}, howpublished = {\url{https://huggingface.co/Jackrong/Qwen3.5-27B-Claude-4.6-Opus-Reasoning-Distilled}} } ```