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Open-weight model · Image and text to text

ViSkill-Sokoban

by Hongxing Li hongxingli/ViSkill-Sokoban

ViSkill-Sokoban is an open-weight model for image and text to text from Hongxing Li. It has 4.1B parameters and a 128,000-token context. At 16-bit it needs about 9.8 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index.

This repository contains ViSkill-Sokoban and its visual skill library, introduced in ViSkill: Reinforcing VLM Agents with Evolving Visual-Native Skills. ViSkill-Sokoban is a visual agent model for Sokoban, built upon Qwen2.5-VL-3B-Instruct.

Parameters4.1B
Context128,000
Weights16.3 GB
License—
AccessOpen weights
Monthly Downloads—

Runs On

What it takes to serve ViSkill-Sokoban (4.1B parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.

PrecisionWeightsMemory neededCheapest setupPer hourAlso fits
16-bit 8.1 GB 9.8 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 4.1 GB 4.9 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 2.0 GB 2.4 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 Oct 16, 2026.

ViSkill-Sokoban on every accelerator the SAVRN Index prices, at every precision

Model Card

This repository contains ViSkill-Sokoban and its visual skill library, introduced in ViSkill: Reinforcing VLM Agents with Evolving Visual-Native Skills. ViSkill-Sokoban is a visual agent model for Sokoban, built upon Qwen2.5-VL-3B-Instruct. It represents successful interactions as reusable visual skill cards. Geometry-aware retrieval guides the agent, while PPO with skill-guided rewards and online skill distillation jointly improve the policy and skill library. Model files are stored at the repository root, with the accompanying visual skill library in skilllibrary/. For the full ViSkill agent pipeline, including skill retrieval and environment interaction, please refer to our code…

Excerpt from the card by Hongxing Li.

Configuration

Architecture
Qwen2_5_VLForConditionalGeneration
Context length (tokens)
128,000
Layers
36
Hidden size
2,048
Feed-forward size
11,008
Attention heads
16
Key/value heads
2
Vocabulary size
151,936
Sliding window (tokens)
32,768
RoPE base
1e+06
Model type
qwen2_5_vl

Identity and Version

Repository
hongxingli/ViSkill-Sokoban
Publisher
Hongxing Li
Task
Image and text to text
Modality
Image and text
Library
transformers
Parameters
4.1B parameters
Languages
Not stated by the source
Revision
b91d65b6b85c57c27b0524a81ccb43ec5d951867
First published
2026-10-08
Last updated
2026-10-09

Files and Weights

71 files, 16.3 GB in total. The weights are 4 files totalling 16.3 GB in safetensors.

Weights4 files · 16.3 GB
Configuration8 files · 104.9 KB
Tokenizer4 files · 15.9 MB
Documentation1 file · 2.3 KB
Other53 files · 645.0 KB
Repository1 file · 1.7 KB
Every file
FileTypeSizeSHA-256
model-00001-of-00004.safetensorsWeights5.0 GB 9279511abe80
model-00002-of-00004.safetensorsWeights4.9 GB dd149a71fbe2
model-00003-of-00004.safetensorsWeights4.9 GB e3dcc7619dca
model-00004-of-00004.safetensorsWeights1.4 GB db600a237045
added_tokens.jsonConfiguration605 B —
config.jsonConfiguration3.4 KB —
generation_config.jsonConfiguration214 B —
model.safetensors.index.jsonConfiguration65.5 KB —
preprocessor_config.jsonConfiguration791 B —
skill_library/skill_index.jsonConfiguration32.8 KB —
special_tokens_map.jsonConfiguration613 B —
video_preprocessor_config.jsonConfiguration935 B —
README.mdDocumentation2.3 KB —
chat_template.jinjaOther1.0 KB —
skill_library/skill_0.pngOther11.3 KB —
skill_library/skill_1.pngOther11.0 KB —
skill_library/skill_10.pngOther11.8 KB —
skill_library/skill_11.pngOther10.1 KB —
skill_library/skill_12.pngOther12.4 KB —
skill_library/skill_13.pngOther12.4 KB —
skill_library/skill_14.pngOther13.1 KB —
skill_library/skill_15.pngOther12.2 KB —
skill_library/skill_16.pngOther11.3 KB —
skill_library/skill_17.pngOther10.2 KB —
skill_library/skill_18.pngOther14.4 KB —
skill_library/skill_19.pngOther10.4 KB —
skill_library/skill_2.pngOther12.6 KB —
skill_library/skill_20.pngOther12.4 KB —
skill_library/skill_21.pngOther13.9 KB —
skill_library/skill_22.pngOther11.5 KB —
skill_library/skill_23.pngOther12.3 KB —
skill_library/skill_24.pngOther13.3 KB —
skill_library/skill_25.pngOther9.7 KB —
skill_library/skill_26.pngOther12.8 KB —
skill_library/skill_27.pngOther13.7 KB —
skill_library/skill_28.pngOther12.0 KB —
skill_library/skill_29.pngOther15.5 KB —
skill_library/skill_3.pngOther16.4 KB —
skill_library/skill_30.pngOther12.9 KB —
skill_library/skill_31.pngOther12.8 KB —
skill_library/skill_32.pngOther14.0 KB —
skill_library/skill_33.pngOther12.8 KB —
skill_library/skill_34.pngOther12.4 KB —
skill_library/skill_35.pngOther12.1 KB —
skill_library/skill_36.pngOther14.2 KB —
skill_library/skill_37.pngOther12.1 KB —
skill_library/skill_38.pngOther12.9 KB —
skill_library/skill_39.pngOther13.4 KB —
skill_library/skill_4.pngOther12.9 KB —
skill_library/skill_40.pngOther12.2 KB —
skill_library/skill_41.pngOther12.7 KB —
skill_library/skill_42.pngOther12.0 KB —
skill_library/skill_43.pngOther16.5 KB —
skill_library/skill_44.pngOther12.2 KB —
skill_library/skill_45.pngOther12.9 KB —
skill_library/skill_46.pngOther12.8 KB —
skill_library/skill_47.pngOther12.2 KB —
skill_library/skill_48.pngOther11.6 KB —
skill_library/skill_49.pngOther12.6 KB —
skill_library/skill_5.pngOther10.4 KB —
skill_library/skill_50.pngOther12.6 KB —
skill_library/skill_51.pngOther12.1 KB —
skill_library/skill_6.pngOther10.3 KB —
skill_library/skill_7.pngOther13.3 KB —
skill_library/skill_8.pngOther8.6 KB —
skill_library/skill_9.pngOther10.3 KB —
.gitattributesRepository1.7 KB —
merges.txtTokenizer1.7 MB —
tokenizer.jsonTokenizer11.4 MB 9c5ae00e602b
tokenizer_config.jsonTokenizer4.7 KB —
vocab.jsonTokenizer2.8 MB —

License and Download

License
Not stated by the source
Access
Open weights, no gate
Download size
16.3 GB
Download from Hongxing Li

Released by Hongxing Li through its official repository on Hugging Face.

Built From

Memory Requirements

PrecisionWeights in memory
As published16.3 GB
16-bit8.1 GB
8-bit4.1 GB
4-bit2.0 GB

Weights only, from the published parameter count; the key-value cache and runtime add to this.

Questions About ViSkill-Sokoban

How much GPU memory does ViSkill-Sokoban need?

About 9.8 GB at 16-bit and 2.4 GB at 4-bit: the weights (4.1B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run ViSkill-Sokoban 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 is ViSkill-Sokoban's context length?

128,000 tokens, from the maximum position embeddings in its published configuration.

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