This is an updated version of Kimi-VL-A3B-Thinking, with following improved abilities:
It Thinks Smarter while Consuming Less Tokens: The 2506 version reaches better accuracy on multimodal reasoning benchmarks: 56.9 on MathVision (+20.1), 80.1 on MathVista (+8.4), 46.3 on MMMU-Pro (+3.3), 64.0 on MMMU (+2.1), while in average requires 20% reduced thinking length.
It Sees Clearer with Thinking: Unlike the previous version that specializes on thinking tasks, the 2506 version can also achieve the same or even better ability on general visual perception and understanding, e.g. MMBench-EN-v1.1 (84.4), MMStar (70.4), RealWorldQA (70.0), MMVet (78.4), surpassing or matching abilties of our non-thinking model (Kimi-VL-A3B-Instruct).
It Extends to Video Scenarios: The new 2506 version also improves on video reasoning and understanding benchmarks. It sets new state-of-the-art for open-source models on VideoMMMU (65.2), while also retains good ability on general video understanding (71.9 on Video-MME, matching Kimi-VL-A3B-Instruct).
It Extends to Higher Resolution: The new 2506 version supports 3.2 million total pixels in a single image, 4X compared to the previous version. This leads to non-trivial improvements on high-resolution perception and OS-agent grounding benchmarks: 83.2 on V* Benchmark (without extra tools), 52.8 on ScreenSpot-Pro, 52.5 on OSWorld-G (full set with refusal).
2. Performance
Comparison with efficient models and two previous versions of Kimi-VL (*Results of GPT-4o is for reference here, and shown in italics):
Benchmark (Metric)
GPT-4o
Qwen2.5-VL-7B
Gemma3-12B-IT
Kimi-VL-A3B-Instruct
Kimi-VL-A3B-Thinking
Kimi-VL-A3B-Thinking-2506
General Multimodal
MMBench-EN-v1.1 (Acc)
83.1
83.2
74.6
82.9
76.0
84.4
RealWorldQA (Acc)
75.4
68.5
59.1
68.1
64.0
70.0
OCRBench (Acc)
815
864
702
864
864
869
MMStar (Acc)
64.7
63.0
56.1
61.7
64.2
70.4
MMVet (Acc)
69.1
67.1
64.9
66.7
69.5
78.1
Reasoning
MMMU (val, Pass@1)
69.1
58.6
59.6
57.0
61.7
64.0
MMMU-Pro (Pass@1)
51.7
38.1
32.1
36.0
43.2
46.3
Math
MATH-Vision (Pass@1)
30.4
25.0
32.1
21.7
36.8
56.9
MathVista_MINI (Pass@1)
63.8
68.0
56.1
68.6
71.7
80.1
Video
VideoMMMU (Pass@1)
61.2
47.4
57.0
52.1
55.5
65.2
MMVU (Pass@1)
67.4
50.1
57.0
52.7
53.0
57.5
Video-MME (w/ sub.)
77.2
71.6
62.1
72.7
66.0
71.9
Agent Grounding
ScreenSpot-Pro (Acc)
0.8
29.0
—
35.4
—
52.8
ScreenSpot-V2 (Acc)
18.1
84.2
—
92.8
—
91.4
OSWorld-G (Acc)
-
31.5
—
41.6
—
52.5
Long Document
MMLongBench-DOC (Acc)
42.8
29.6
21.3
35.1
32.5
42.1
Comparison with 30B-70B open-source models:
Benchmark (Metric)
Kimi-VL-A3B-Thinking-2506
Qwen2.5-VL-32B
Qwen2.5-VL-72B
Gemma3-27B-IT
General Multimodal
MMBench-EN-v1.1 (Acc)
84.4
-
88.3
78.9
RealWorldQA (Acc)
70.0
-
75.7
62.5
OCRBench (Acc)
869
-
885
753
MMStar (Acc)
70.4
69.5
70.8
63.1
MMVet (Acc)
78.1
-
74.0
71.0
Reasoning
MMMU (val, Pass@1)
64.0
70.0
70.2
64.9
MMMU-Pro (Pass@1)
46.3
49.5
51.1
-
MATH-Vision (Pass@1)
56.9
38.4
38.1
35.4
MathVista_MINI (Pass@1)
80.1
74.7
74.8
59.8
Video
VideoMMMU (Pass@1)
65.2
-
60.2
61.8
MMVU (Pass@1)
57.5
-
62.9
61.3
Video-MME (w/ sub.)
71.9
70.5/77.9
73.3/79.1
-
Agent Grounding
ScreenSpot-Pro (Acc)
52.8
39.4
43.6
-
ScreenSpot-V2 (Acc)
91.4
-
-
-
OSWorld-G (Acc)
52.5
46.5
-
-
Long Document
MMLongBench-DOC (Acc)
42.1
-
38.8
-
Text results, comparison with 30B-level non-thinking VLMs:
Benchmark (Metric)
Kimi-VL-A3B-Thinking-2506
Qwen2.5-VL-32B
Gemma3-27B-IT
MMLU
82.0
78.4
76.9
MMLU-Pro
68.5
68.8
67.5
MATH
91.8
82.2
89.0
GPQA-Diamond
42.3
46.0
46.0
3. Usage
3.1. Inference with VLLM (recommended)
As a long-decode model that will generates up to 32K tokens, we recommend using VLLM for inference, which has already supported Kimi-VL series.
[!Note]
It is important to explicitly install flash-attn to avoid CUDA out-of-memory.
python
1from transformers import AutoProcessor
2from vllm import LLM, SamplingParams
34model_path ="moonshotai/Kimi-VL-A3B-Thinking-2506"5llm = LLM(6 model_path,7 trust_remote_code=True,8 max_num_seqs=8,9 max_model_len=131072,10 limit_mm_per_prompt={"image":256}11)1213processor = AutoProcessor.from_pretrained(model_path, trust_remote_code=True)1415sampling_params = SamplingParams(max_tokens=32768, temperature=0.8)161718import requests
19from PIL import Image
2021defextract_thinking_and_summary(text:str, bot:str="◁think▷", eot:str="◁/think▷")->str:22if bot in text and eot notin text:23return""24if eot in text:25return text[text.index(bot)+len(bot):text.index(eot)].strip(), text[text.index(eot)+len(eot):].strip()26return"", text
2728OUTPUT_FORMAT ="--------Thinking--------\n{thinking}\n\n--------Summary--------\n{summary}"2930url ="https://huggingface.co/spaces/moonshotai/Kimi-VL-A3B-Thinking/resolve/main/images/demo6.jpeg"31image = Image.open(requests.get(url,stream=True).raw)3233messages =[34{"role":"user","content":[{"type":"image","image":""},{"type":"text","text":"What kind of cat is this? Answer with one word."}]}35]36text = processor.apply_chat_template(messages, add_generation_prompt=True, return_tensors="pt")3738outputs = llm.generate([{"prompt": text,"multi_modal_data":{"image": image}}], sampling_params=sampling_params)39generated_text = outputs[0].outputs[0].text
4041thinking, summary = extract_thinking_and_summary(generated_text)42print(OUTPUT_FORMAT.format(thinking=thinking, summary=summary))
3.2. Inference with 🤗 Hugging Face Transformers
We introduce how to use our model at inference stage using transformers library. It is recommended to use python=3.10, torch>=2.1.0, and transformers=4.48.2 as the development environment.
python
1from PIL import Image
2from transformers import AutoModelForCausalLM, AutoProcessor
34defextract_thinking_and_summary(text:str, bot:str="◁think▷", eot:str="◁/think▷")->str:5if bot in text and eot notin text:6return""7if eot in text:8return text[text.index(bot)+len(bot):text.index(eot)].strip(), text[text.index(eot)+len(eot):].strip()9return"", text
1011OUTPUT_FORMAT ="--------Thinking--------\n{thinking}\n\n--------Summary--------\n{summary}"1213url ="https://huggingface.co/spaces/moonshotai/Kimi-VL-A3B-Thinking/resolve/main/images/demo6.jpeg"1415model_path ="moonshotai/Kimi-VL-A3B-Thinking-2506"16model = AutoModelForCausalLM.from_pretrained(17 model_path,18 torch_dtype="auto",19 device_map="auto",20 trust_remote_code=True,21)22processor = AutoProcessor.from_pretrained(model_path, trust_remote_code=True)2324image_paths =[url]25images =[Image.open(path)for path in image_paths]26messages =[27{28"role":"user",29"content":[30{"type":"image","image": image_path}for image_path in image_paths
31]+[{"type":"text","text":"What kind of cat is this? Answer with one word."}],32},33]34text = processor.apply_chat_template(messages, add_generation_prompt=True, return_tensors="pt")35inputs = processor(images=images, text=text, return_tensors="pt", padding=True, truncation=True).to(model.device)36generated_ids = model.generate(**inputs, max_new_tokens=32768, temperature=0.8)37generated_ids_trimmed =[38 out_ids[len(in_ids):]for in_ids, out_ids inzip(inputs.input_ids, generated_ids)39]40response = processor.batch_decode(41 generated_ids_trimmed, skip_special_tokens=True, clean_up_tokenization_spaces=False42)[0]43print(response)
4. Citation
@misc{kimiteam2025kimivltechnicalreport,
title={{Kimi-VL} Technical Report},
author={Kimi Team and Angang Du and Bohong Yin and Bowei Xing and Bowen Qu and Bowen Wang and Cheng Chen and Chenlin Zhang and Chenzhuang Du and Chu Wei and Congcong Wang and Dehao Zhang and Dikang Du and Dongliang Wang and Enming Yuan and Enzhe Lu and Fang Li and Flood Sung and Guangda Wei and Guokun Lai and Han Zhu and Hao Ding and Hao Hu and Hao Yang and Hao Zhang and Haoning Wu and Haotian Yao and Haoyu Lu and Heng Wang and Hongcheng Gao and Huabin Zheng and Jiaming Li and Jianlin Su and Jianzhou Wang and Jiaqi Deng and Jiezhong Qiu and Jin Xie and Jinhong Wang and Jingyuan Liu and Junjie Yan and Kun Ouyang and Liang Chen and Lin Sui and Longhui Yu and Mengfan Dong and Mengnan Dong and Nuo Xu and Pengyu Cheng and Qizheng Gu and Runjie Zhou and Shaowei Liu and Sihan Cao and Tao Yu and Tianhui Song and Tongtong Bai and Wei Song and Weiran He and Weixiao Huang and Weixin Xu and Xiaokun Yuan and Xingcheng Yao and Xingzhe Wu and Xinxing Zu and Xinyu Zhou and Xinyuan Wang and Y. Charles and Yan Zhong and Yang Li and Yangyang Hu and Yanru Chen and Yejie Wang and Yibo Liu and Yibo Miao and Yidao Qin and Yimin Chen and Yiping Bao and Yiqin Wang and Yongsheng Kang and Yuanxin Liu and Yulun Du and Yuxin Wu and Yuzhi Wang and Yuzi Yan and Zaida Zhou and Zhaowei Li and Zhejun Jiang and Zheng Zhang and Zhilin Yang and Zhiqi Huang and Zihao Huang and Zijia Zhao and Ziwei Chen},
year={2025},
eprint={2504.07491},
archivePrefix={arXiv},
primaryClass={cs.CV},
url={https://arxiv.org/abs/2504.07491},
}