The text-to-image prompt rewriter for Qwen-Image-2.1, a fine-tuned Qwen3.5-VL 9B that turns a short request into a detailed English prompt plus a recommended aspect ratio, with its refusal behaviour reduced by Heretic directional ablation. bf16, same shapes and parameter count as the source. systemprompt.txt is included and required (the unmodified file from the source repo). for image edits. Measured by Heretic on mlabonne/harmfulbehaviors (refusals) and mlabonne/harmlessalpaca (KL divergence, the damage to ordinary behaviour), with Heretic's default system prompt. The first row is an independent evaluation of the exported weights (evaluatemodel); the search's own figure for the same trial…
Open-weight model · Text to image
Qwen-Image-2.1-PE-T2I-Heretic-NVFP4
by Darrellbest darrellbest/Qwen-Image-2.1-PE-T2I-Heretic-NVFP4
Qwen-Image-2.1-PE-T2I-Heretic-NVFP4 is an open-weight model for text to image from Darrellbest, released under other. It has 9.4B parameters and a 262,144-token context. At 16-bit it needs about 22.6 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index. It draws 13 downloads a month.
NVFP4 (4-bit floating point, W4A4) build of darrellbest/Qwen-Image-2.1-PE-T2I-Heretic, the refusal-ablated text-to-image prompt rewriter for Qwen-Image-2.1. For vLLM on NVIDIA Blackwell GPUs, which run NVFP4 natively. 11 GB instead of 18 GB.
Parameters9.4B
Context262,144
Weights11.2 GB
Licenseother
AccessOpen weights
Monthly Downloads13
Runs On
What it takes to serve Qwen-Image-2.1-PE-T2I-Heretic-NVFP4 (9.4B parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.
| Precision | Weights | Memory needed | Cheapest setup | Per hour | Also fits |
|---|---|---|---|---|---|
| 16-bit | 18.8 GB | 22.6 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
| 8-bit | 9.4 GB | 11.3 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
| 4-bit | 4.7 GB | 5.6 GB | 1x MI300X (192 GB) Vultr |
$1.85 | 1x H100 $1.99 · 1x MI325X $2.00 |
Memory is the weights at that precision plus 20% for the runtime and a short context; a long context needs more. Prices are the lowest on-demand hourly rates in the SAVRN Index, read Sep 24, 2026.
Qwen-Image-2.1-PE-T2I-Heretic-NVFP4 on every accelerator the SAVRN Index prices, at every precision
Model Card
NVFP4 (4-bit floating point, W4A4) build of darrellbest/Qwen-Image-2.1-PE-T2I-Heretic, the refusal-ablated text-to-image prompt rewriter for Qwen-Image-2.1. For vLLM on NVIDIA Blackwell GPUs, which run NVFP4 natively. 11 GB instead of 18 GB. systemprompt.txt is included and required, exactly as for the original. The linear-attention layers carry a recurrent state and the vision tower encodes the input image; both were left in bf16, as other quantizations of this model family do. That is why the file is 11 GB rather than ~6 GB. Made with llm-compressor 0.13.0 (QuantizationModifier, scheme="NVFP4"), calibrated on 64 samples in the model's real input format: its own system prompt and a short…
Excerpt from the card by Darrellbest, licensed other.
Configuration
- Architecture
- Qwen3_5ForConditionalGeneration
- Context length (tokens)
- 262,144
- Layers
- 32
- Hidden size
- 4,096
- Feed-forward size
- 12,288
- Attention heads
- 16
- Key/value heads
- 4
- Head dimension
- 256
- Vocabulary size
- 248,320
- Model type
- qwen3_5
- Quantization
- compressed-tensors
Identity and Version
- Repository
- darrellbest/Qwen-Image-2.1-PE-T2I-Heretic-NVFP4
- Publisher
- Darrellbest
- Task
- Text to image
- Modality
- Image
- Library
- Not stated by the source
- Parameters
- 9.4B parameters
- Languages
- Not stated by the source
- Revision
- 07109af8e169580aac303c866da848758f667026
- First published
- 2026-09-22
- Last updated
- 2026-09-24
Files and Weights
12 files, 11.2 GB in total. The weights are 1 file totalling 11.2 GB in safetensors.
Weights1 file · 11.2 GB
Configuration4 files · 21.0 KB
Tokenizer2 files · 20.0 MB
Documentation2 files · 11.3 KB
Other2 files · 17.8 KB
Repository1 file · 1.6 KB
Every file
| File | Type | Size | SHA-256 |
|---|---|---|---|
| model.safetensors | Weights | 11.2 GB | 55fccd837d96 |
| config.json | Configuration | 19.2 KB | — |
| generation_config.json | Configuration | 205 B | — |
| processor_config.json | Configuration | 1.3 KB | — |
| recipe.yaml | Configuration | 269 B | — |
| LICENSE | Documentation | 7.8 KB | — |
| README.md | Documentation | 3.5 KB | — |
| chat_template.jinja | Other | 7.8 KB | — |
| system_prompt.txt | Other | 10.0 KB | — |
| .gitattributes | Repository | 1.6 KB | — |
| tokenizer.json | Tokenizer | 20.0 MB | 87a7830d63fc |
| tokenizer_config.json | Tokenizer | 1.2 KB | — |
License and Download
- License
- other
- Access
- Open weights, no gate
- Download size
- 11.2 GB
Download from Darrellbest
Released by Darrellbest through its official repository on Hugging Face.
Built From
- Derived from darrellbest/Qwen-Image-2.1-PE-T2I-Heretic
- Quantized from darrellbest/Qwen-Image-2.1-PE-T2I-Heretic
Memory Requirements
| Precision | Weights in memory |
|---|---|
| As published | 11.2 GB |
| 16-bit | 18.8 GB |
| 8-bit | 9.4 GB |
| 4-bit | 4.7 GB |
Weights only, from the published parameter count; the key-value cache and runtime add to this.
Questions About Qwen-Image-2.1-PE-T2I-Heretic-NVFP4
How much GPU memory does Qwen-Image-2.1-PE-T2I-Heretic-NVFP4 need?
About 22.6 GB at 16-bit and 5.6 GB at 4-bit: the weights (9.4B parameters) plus a working margin. A long context needs more.
What is the cheapest GPU to run Qwen-Image-2.1-PE-T2I-Heretic-NVFP4 on?
At 16-bit, 1x MI300X from $1.85 an hour; at 4-bit, 1x MI300X from $1.85 an hour, at the lowest on-demand prices the SAVRN Index lists.
What license is Qwen-Image-2.1-PE-T2I-Heretic-NVFP4 released under?
other, as its publisher declares it. Read the license text before commercial use.
What is Qwen-Image-2.1-PE-T2I-Heretic-NVFP4's context length?
262,144 tokens, from the maximum position embeddings in its published configuration.
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