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Model Details
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amd
Model Tree
Qwen/Qwen3.8-27B
Input Modalities
Output Modalities
Supported Functionality
| Benchmark | Setting | This model (Qronos) | BF16 base | Recovery % |
|---|---|---|---|---|
| GSM8K, 5-shot (flexible-extract / strict-match) | Thinking: temperature=1.0, top_p=0.95, top_k=20, min_p=0.0, presence_penalty=0.0, repetition_penalty=1.0, max_gen_toks=8192 | 94.62% / 94.69% | 93.33% / 93.33% | 101.4% |
| GSM8K, 5-shot (flexible-extract / strict-match) | Non-thinking: temperature=0.7, top_p=0.80, top_k=20, min_p=0.0, presence_penalty=1.5, repetition_penalty=1.0, max_gen_toks=8192 | 89.99% / 89.84% | 90.67% / 89.76% | 99.2% |
| Wikitext perplexity | Greedy | 8.6819 | 8.4364 | 97.2% |
| BFCL Overall Acc (single_turn)* | Greedy (harness default) | 23.80% | 24.38% | 97.6% |
* BFCL Overall Acc reflects only single_turn categories, not the full Gorilla-leaderboard formula (multi-turn/web-search/memory categories were not run and would count as 0 against the public leaderboard's own Overall Acc). Sub-metrics: Non-Live AST 85.17% (base 88.52%), Live AST 82.09% (base 83.05%), Relevance Detection 62.50% (base 75.00%), Irrelevance Detection 70.79% (base 72.22%).
Recovery % = quantized / BF16-base, using flexible-extract for GSM8K rows and base/quantized (inverted, since lower is better) for perplexity — both measured by us against verified-upstream Qwen/Qwen3.8-27B weights, not vendor-reported numbers. GSM8K uses lm-evaluation-harness; non-thinking mode is approximated by pre-closing an empty <think></think> block in the prompt, since the harness task is a raw few-shot completion rather than a chat-templated request. BFCL run via the official bfcl_eval harness.
GSM8K, thinking mode, via lm-evaluation-harness's native vLLM backend:
bash
lm-eval run \--model vllm \--model_args pretrained=amd/Qwen3.8-27B-Quark-Qronos-INT4-W4A16,tensor_parallel_size=1,dtype=auto,gpu_memory_utilization=0.4,enforce_eager=True,trust_remote_code=True \--tasks gsm8k \--num_fewshot 5 \--gen_kwargs max_gen_toks=8192,do_sample=True,temperature=1.0,top_p=0.95,top_k=20,min_p=0.0,presence_penalty=0.0,repetition_penalty=1.0 \--batch_size auto \--log_samples
GSM8K, no-thinking mode. The prompt suffix <think>\n\n</think>\n\n is prepended to each answer field to suppress the model's thinking preamble (see custom task yaml below).
yaml
# gsm8k_nothink.yamltask: gsm8k_nothinkdataset_path: openai/gsm8kdataset_name: mainoutput_type: generate_untiltraining_split: trainfewshot_split: traintest_split: testdoc_to_text: "Question: {{question}}\nAnswer: <think>\n\n</think>\n\n"doc_to_target: "{{answer}}"metric_list:- metric: exact_matchaggregation: meanhigher_is_better: trueignore_case: trueignore_punctuation: falseregexes_to_ignore: [",", "\\$", "(?s).*#### ", "\\.$"]generation_kwargs:until: ["Question:", "</s>", "<|im_end|>"]do_sample: falsetemperature: 0.0repeats: 1num_fewshot: 5filter_list:- name: "strict-match"filter: [{function: "regex", regex_pattern: "#### (\\-?[0-9\\.\\,]+)"}, {function: "take_first"}]- name: "flexible-extract"filter: [{function: "regex", group_select: -1, regex_pattern: "(-?[$0-9.,]{2,})|(-?[0-9]+)"}, {function: "take_first"}]metadata: {version: 3.0}
bash
lm-eval run \--model vllm \--model_args pretrained=amd/Qwen3.8-27B-Quark-Qronos-INT4-W4A16,tensor_parallel_size=1,dtype=auto,gpu_memory_utilization=0.4,enforce_eager=True,trust_remote_code=True \--tasks gsm8k_nothink \--include_path <dir containing gsm8k_nothink.yaml> \--num_fewshot 5 \--gen_kwargs max_gen_toks=8192,do_sample=True,temperature=0.7,top_p=0.80,top_k=20,min_p=0.0,presence_penalty=1.5,repetition_penalty=1.0 \--batch_size auto \--log_samples
--gen_kwargs on the CLI overrides the YAML task's own generation_kwargs defaults (greedy) with the instruct-mode recommended sampling parameters used for the non-thinking scores above.
bash
python3 quantize_quark.py \--model_dir Qwen/Qwen3.8-27B \--output_dir Qwen3.8-27B-Quark-Qronos-INT4-W4A16 \--quant_scheme int4_wo_128 \--num_calib_data 128 \--seq_len 512 \--quant_algo qronos \--model_export hf_format \--data_type auto \--device cuda
Run from Quark/examples/torch/language_modeling/llm_ptq using AMD Quark with native qwen3_5 architecture support for Qronos (contributed upstream).
Requires a Quark-compatible inference runtime with W4A16Int4 scheme support (https://github.com/vllm-project/vllm/pull/48606).
bash
vllm serve amd/Qwen3.8-27B-Quark-Qronos-INT4-W4A16 \--trust-remote-code \--tensor-parallel-size 1 \--reasoning-parser qwen3
Quantized using the Qronos algorithm (Zhang et al., ICLR 2026):
bibtex
@inproceedings{zhang2026qronos,title={Qronos: Correcting the Past by Shaping the Future... in Post-Training Quantization},author={Zhang, Shihao and Zhang, Haoyu and Colbert, Ian and Saab, Rayan},booktitle={International Conference on Learning Representations (ICLR)},year={2026},url={https://arxiv.org/abs/2505.11695}}
Modifications Copyright(c) 2026 Advanced Micro Devices, Inc. All rights reserved.