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Open-weight model · Image and text to text

Qwen3.5-2B

by Qwen Qwen/Qwen3.5-2B

Over recent months, we have intensified our focus on developing foundation models that deliver exceptional utility and performance.

Parameters2.3B
Context262,144
Weights4.5 GB
Licenseapache-2.0
AccessOpen weights
Monthly Downloads4.8M

Runs On

What it takes to serve Qwen3.5-2B (2.3B 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 4.5 GB 5.5 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 2.3 GB 2.7 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 1.1 GB 1.4 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 Sep 18, 2026.

SAVRN's Notes on Qwen3.5-2B

We would size this one by its context window rather than its weights. The 2.3B parameters need 5.5 GB at 16-bit, 2.7 GB at 8-bit and 1.4 GB at 4-bit, so on the cheapest Index setup, one MI300X with 192 GB at $1.85 an hour on-demand, the weights take a sliver of the card and the 262,144-token context fills the rest. It takes images and text in and returns text, and the footprint buys many concurrent copies or one copy holding long inputs.

Apache 2.0 covers commercial use, modification and redistribution, with notices kept, significant changes stated and a patent grant included. Two checks: the page records a derivation from Qwen/Qwen3.5-2B-Base, so decide whether you want that base for your own post-training or this release, and no Index host prices it by the token yet, so the $1.85 hourly card is the number to run your volume against.

Model Card

By Qwen, published under apache-2.0, revision 15852e8c1636.

[!Note] This repository contains model weights and configuration files for the post-trained model in the Hugging Face Transformers format.

These artifacts are compatible with Hugging Face Transformers, vLLM, SGLang, KTransformers, etc.

In light of its parameter scale, the intended use cases are prototyping, task-specific fine-tuning, and other research or development purposes.

Over recent months, we have intensified our focus on developing foundation models that deliver exceptional utility and performance. Qwen3.5 represents a significant leap forward, integrating breakthroughs in multimodal learning, architectural efficiency, reinforcement learning scale, and global accessibility to empower developers and enterprises with unprecedented capability and efficiency.

Qwen3.5 Highlights

Qwen3.5 features the following enhancement:

Read the full model card (2,815 words)

Configuration

Architecture
Qwen3_5ForConditionalGeneration
Context length (tokens)
262,144
Layers
24
Hidden size
2,048
Feed-forward size
6,144
Attention heads
8
Key/value heads
2
Head dimension
256
Vocabulary size
248,320
Model type
qwen3_5

Identity and Version

Repository
Qwen/Qwen3.5-2B
Publisher
Qwen
Task
Image and text to text
Modality
Image and text
Library
transformers
Parameters
2.3B parameters
Languages
Not stated by the source
Revision
15852e8c16360a2fea060d615a32b45270f8a8fc
First published
2026-02-28
Last updated
2026-03-02

Files and Weights

13 files, 4.6 GB in total. The weights are 1 file totalling 4.5 GB in safetensors.

Weights1 file · 4.5 GB
Configuration4 files · 68.1 KB
Tokenizer4 files · 22.9 MB
Documentation2 files · 74.4 KB
Other1 file · 7.8 KB
Repository1 file · 1.6 KB
Every file
FileTypeSizeSHA-256
model.safetensors-00001-of-00001.safetensorsWeights4.5 GB aa33250c4fc6
config.jsonConfiguration2.9 KB
model.safetensors.index.jsonConfiguration64.5 KB
preprocessor_config.jsonConfiguration390 B
video_preprocessor_config.jsonConfiguration385 B
LICENSEDocumentation11.5 KB
README.mdDocumentation62.8 KB
chat_template.jinjaOther7.8 KB
.gitattributesRepository1.6 KB
merges.txtTokenizer3.4 MB
tokenizer.jsonTokenizer12.8 MB 5f9e4d4901a9
tokenizer_config.jsonTokenizer16.7 KB
vocab.jsonTokenizer6.7 MB

License and Download

License
apache-2.0
Access
Open weights, no gate
Download size
4.5 GB
Download from Qwen

Released by Qwen through ModelScope. Read the license.

Built From

  • Derived from Qwen/Qwen3.5-2B-Base

Evaluations

Each result is shown as reported, with the conditions its reporter stated. None is a SAVRN measurement. A comparison lines two results up only when their configuration, unit and setup are all stated and identical.

BenchmarkConditionsResultReported byRevisionDate
Idavidrein/gpqa Task diamondMetric diamondSetup GPQA DiamondComparison conditions not established 44.9495 EvalEval
Reported by a third party
Evaluated revision not stated 2026-04-20
LiquidAI/ifstruct-v1.0 Task ifstruct_v1Metric ifstruct_v1Comparison conditions not established 33.15 Liquid AI — IFStruct v1.0 blog (Qwen3.5-2B)
Reported by a third party
Evaluated revision not stated 2026-06-30
MMMU/MMMU_Pro Task mmmu_pro_visionMetric mmmu_pro_visionSetup ThinkingComparison conditions not established 50.3 Model Card
Reported by a third party
Evaluated revision not stated 2026-04-28
TIGER-Lab/MMLU-Pro Task mmlu_proMetric mmlu_proComparison conditions not established 55.3 Model Card
Reported by a third party
Evaluated revision not stated 2026-03-02
likaixin/ScreenSpot-Pro Task overallMetric overallComparison conditions not established 54.5 Model Card
Reported by a third party
Evaluated revision not stated 2026-03-18
llamaindex/ExtractBench Task longMetric longSetup Pipeline name: qwen3_5_2b_vllm_extract_oneshot_structured_output_fileComparison conditions not established 25.93 ExtractBench
Reported by a third party
Evaluated revision not stated 2026-08-24
llamaindex/ExtractBench Task meanMetric meanSetup Pipeline name: qwen3_5_2b_vllm_extract_oneshot_structured_output_fileComparison conditions not established 63.4 ExtractBench
Reported by a third party
Evaluated revision not stated 2026-08-24
llamaindex/ExtractBench Task mediumMetric mediumSetup Pipeline name: qwen3_5_2b_vllm_extract_oneshot_structured_output_fileComparison conditions not established 50.93 ExtractBench
Reported by a third party
Evaluated revision not stated 2026-08-24
llamaindex/ExtractBench Task shortMetric shortSetup Pipeline name: qwen3_5_2b_vllm_extract_oneshot_structured_output_fileComparison conditions not established 71.22 ExtractBench
Reported by a third party
Evaluated revision not stated 2026-08-24
llamaindex/ParseBench Task chartMetric chartSetup Pipeline name: qwen3_5_2b_vllm_layoutComparison conditions not established 0.1 ParseBench
Reported by a third party
Evaluated revision not stated 2026-04-22
llamaindex/ParseBench Task layoutMetric layoutSetup Pipeline name: qwen3_5_2b_vllm_layoutComparison conditions not established 18.3 ParseBench
Reported by a third party
Evaluated revision not stated 2026-04-22
llamaindex/ParseBench Task meanMetric meanSetup Pipeline name: qwen3_5_2b_vllm_layoutComparison conditions not established 27.3 ParseBench
Reported by a third party
Evaluated revision not stated 2026-04-22
llamaindex/ParseBench Task tableMetric tableSetup Pipeline name: qwen3_5_2b_vllm_layoutComparison conditions not established 0 ParseBench
Reported by a third party
Evaluated revision not stated 2026-04-22
llamaindex/ParseBench Task text_contentMetric text_contentSetup Pipeline name: qwen3_5_2b_vllm_layoutComparison conditions not established 87.2 ParseBench
Reported by a third party
Evaluated revision not stated 2026-04-22
llamaindex/ParseBench Task text_formattingMetric text_formattingSetup Pipeline name: qwen3_5_2b_vllm_layoutComparison conditions not established 31.1 ParseBench
Reported by a third party
Evaluated revision not stated 2026-04-22

Memory Requirements

PrecisionWeights in memory
As published4.5 GB
16-bit4.5 GB
8-bit2.3 GB
4-bit1.1 GB

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

Built on This Model

Compare Qwen3.5-2B

Questions About Qwen3.5-2B

How much GPU memory does Qwen3.5-2B need?

About 5.5 GB at 16-bit and 1.4 GB at 4-bit: the weights (2.3B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run Qwen3.5-2B 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.

Can I use Qwen3.5-2B commercially?

Yes. Qwen3.5-2B is released under Apache License 2.0. The Apache License 2.0 is a permissive open-source license. It permits commercial use, modification and redistribution. It requires keeping the license and copyright notices and any NOTICE file, stating significant changes, and it includes an express patent grant from contributors.

What is Qwen3.5-2B's context length?

262,144 tokens, from the maximum position embeddings in its published configuration.

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