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Model: AnkitAI/Parable-Qwen3-8B-Claude-Fable-5 Source: Original Platform
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README.md
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README.md
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---
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base_model: Qwen/Qwen3-8B
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base_model_relation: finetune
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datasets:
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- Glint-Research/Fable-5-traces
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- Roman1111111/gpt5.5-terminal
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license: apache-2.0
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language:
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- en
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pipeline_tag: text-generation
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library_name: transformers
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tags:
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- safetensors
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- qlora
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- agentic
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- coding
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- reasoning
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- thinking
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- claude
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- qwen3
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---
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# Parable-Qwen3-8B-Claude-Fable-5
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<picture>
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<source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/ankit-aglawe/parable-assets/main/parable_header_dark.png">
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<img alt="Parable" src="https://raw.githubusercontent.com/ankit-aglawe/parable-assets/main/parable_header.png">
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</picture>
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**Qwen3-8B trained on real Claude Fable 5 and GPT-5.5 agent traces: 67% lower held-out test loss than its base, and the strongest strictly-graded qualitative score in the Parable series: 23 of 34 fully correct.**
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Parable-Qwen3-8B is a [Qwen/Qwen3-8B](https://huggingface.co/Qwen/Qwen3-8B) fine-tune trained on real multi-step agent sessions: planning, tool use, and `<think>` reasoning captured from actual Claude Fable 5 and GPT-5.5 agent work, not synthetic Q&A. Highest strict-qual release in the Parable series, alongside the [Granite 8B line](https://huggingface.co/AnkitAI/Parable-Granite-4.1-8B-Claude-Fable-5).
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## Usage
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```python
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from transformers import AutoModelForCausalLM, AutoTokenizer
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model = AutoModelForCausalLM.from_pretrained(
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"AnkitAI/Parable-Qwen3-8B-Claude-Fable-5",
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torch_dtype="auto", device_map="auto")
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tok = AutoTokenizer.from_pretrained("AnkitAI/Parable-Qwen3-8B-Claude-Fable-5")
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msgs = [{"role": "user", "content": "Write a Python function that retries an HTTP request with exponential backoff."}]
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ids = tok.apply_chat_template(msgs, add_generation_prompt=True, return_tensors="pt").to(model.device)
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out = model.generate(ids, max_new_tokens=3000, temperature=0.7, top_p=0.95, do_sample=True)
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text = tok.decode(out[0][ids.shape[1]:], skip_special_tokens=True)
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answer = text.split("</think>")[-1].strip() # response opens with a <think> block
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print(answer)
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```
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GGUF quants for llama.cpp / Ollama / LM Studio: [Parable-Qwen3-8B-Claude-Fable-5-GGUF](https://huggingface.co/AnkitAI/Parable-Qwen3-8B-Claude-Fable-5-GGUF).
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**Sampling:** temperature 0.7, top_p 0.95, generous max_new_tokens (at least 2500).
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## Training data
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- [Glint-Research/Fable-5-traces](https://huggingface.co/datasets/Glint-Research/Fable-5-traces): 4.4k real Claude Fable 5 coding-agent session traces with `<think>` reasoning and tool calls (AGPL-3.0)
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- [Roman1111111/gpt5.5-terminal](https://huggingface.co/datasets/Roman1111111/gpt5.5-terminal): terminal-agent task solutions (MIT)
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Every example passed a quality gate (schema validation, secrets scrub, length filtering) before training. QLoRA fine-tune (NF4, sequence length 1024) trained on a single 16 GB GPU, quantized with [llama.cpp](https://github.com/ggml-org/llama.cpp).
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## Evaluation
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Held-out test split, identical evaluation code and context length for base and fine-tune:
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| Metric | Base Qwen3-8B | Parable | Δ |
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|---|---|---|---|
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| Test loss | 2.162 | **0.712** | **−67%** |
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**Qualitative review** (34 coding/terminal/debugging prompts, strictly graded by mentally executing every answer): **23/34 fully correct, 30/34 correct or partially correct** — the highest fully-correct score in the series. We publish these numbers because strict qualitative grading is rare in this niche; judge accordingly.
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For reference, the strongest published fine-tune on this data family (a 9B) reports 0.71 validation loss. Cross-repo numbers are indicative only: splits, tokenizers, and context lengths differ (ours is measured at 1,024 tokens).
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## Limitations
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- Trained for agent work: on ops-style prompts it sometimes (2/34 in our eval) responds with structured tool-call JSON rather than prose. Useful inside agent harnesses; in plain chat, re-prompt or lower the temperature.
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- Fine-tuned at 1,024-token sequences; the base model's native 128K-token context remains fully available, so long sessions work, with the fine-tuned behavior strongest in the opening turns.
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As a fine-tune it inherits Qwen3-8B's base behaviors and knowledge cutoff. As with any local model, treat generated commands and code as drafts to review.
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## Provenance & licensing
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Model weights: **Apache-2.0** (inherited from Qwen3-8B). Training data licenses: Fable-5-traces **AGPL-3.0**, gpt5.5-terminal **MIT**. Because those traces originate from third-party assistants, the providers' terms may apply to downstream training and distillation. If you plan to build on this model commercially, confirm your use aligns with those terms.
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## Get Parable
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| Platform | Command / Link |
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| Ollama | `ollama run parable/qwen3-fable:8b` |
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| Ollama (family flagship, best per size) | `ollama run parable/fable` |
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| Hugging Face | [GGUF quants, full weights, eval reports](https://huggingface.co/collections/AnkitAI/parable-6a4fac60f4b35afca3019621) |
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| LM Studio | `lms get parable/qwen3-fable` ([parable on LM Studio Hub](https://lmstudio.ai/parable)) |
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## Acknowledgements
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- [Glint-Research](https://huggingface.co/Glint-Research) and [Roman1111111](https://huggingface.co/Roman1111111) for the open trace datasets
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- [Qwen](https://huggingface.co/Qwen) for the base model
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- [empero-ai](https://huggingface.co/empero-ai), whose Qwable recipe the Parable series follows
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- [llama.cpp](https://github.com/ggml-org/llama.cpp)
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