What are the hardware requirements for H2o Lightning 4B?

H2o Lightning 4B requires approximately 9.1 GB of VRAM. Quantized variants may run on less VRAM; see the Quantized Models section on this page.

Who developed H2o Lightning 4B and how large is it?

H2o Lightning 4B is developed by h2oai, a model with 4b parameters. The model is published as open weights on Hugging Face and indexed on LLM Explorer with full benchmark history.

Where can I download or evaluate H2o Lightning 4B?

H2o Lightning 4B is hosted on Hugging Face and linked from this page. LLM Explorer also lists quantized variants and similar alternatives if available.

H2o Lightning 4B by h2oai — VRAM 9.1GB

Name: H2o Lightning 4B
Author: h2oai

H2o Lightning 4B is an open-source language model by h2oai. Features: 4b LLM, VRAM: 9.1GB, License: apache-2.0, LLM Explorer Score: 0.35.

Base model:finetune:qwen/qwen3... Base model:qwen/qwen3.5-4b Calibration Conversational Decision-making Endpoints compatible Image-text-to-text Jevbench Multimodal Qwen3 5 Region:us Safetensors

Model Card on HF 🤗: https://huggingface.co/h2oai/h2o-lightning-4b

H2o Lightning 4B Parameters and Internals

LLM Name	H2o Lightning 4B
Repository 🤗	https://huggingface.co/h2oai/h2o-lightning-4b
Base Model(s)	Qwen/Qwen3.5-4B Qwen/Qwen3.5-4B
Model Size	4b
Required VRAM	9.1 GB
Updated	2026-10-08
Maintainer	h2oai
Model Type	qwen3_5
Model Files	9.1 GB
Model Architecture	Qwen3_5ForConditionalGeneration
License	apache-2.0
Model Max Length	262144
Transformers Version	4.57.0.dev0
Tokenizer Class	Qwen2Tokenizer
Padding Token	<\|endoftext\|>
Errors	replace

Rank the H2o Lightning 4B capabilities

Have you tried this model? Rate its performance — this feedback helps the ML community find the right model for their needs.

Instruction Following and Task Automation
Factuality and Completeness of Knowledge
Censorship and Alignment
Data Analysis and Insight Generation
Text Generation
Text Summarization and Feature Extraction
Code Generation
Multi-Language Support and Translation

Best Alternatives to H2o Lightning 4B

Best Alternatives	Context / RAM	Downloads	Likes
AgentHorse 4B	256K / 8.4 GB	639	7
Qwen3.5 4B	0K / 9.3 GB	6575502	801
NuExtract3	0K / 0.2 GB	441570	324
FrogNano 4B 2609	0K / 9.3 GB	733	113
Agents A1 4B	0K / 9.1 GB	177578	72
Intern Decision 4B	0K / 0.1 GB	338	48
Tev1 4B Experimental	0K / 9.3 GB	1539	16
DeskForge Qwen3.5 4B	0K / 9.1 GB	1319	5
Biodecision Tev1 4B	0K / 9.3 GB	678	11
Qwen3.5 4B Base	0K / 9.3 GB	227814	79

Note: green Score (e.g. "73.2") means that the model is better than h2oai/h2o-lightning-4b.