What are the hardware requirements for GPT Oss 120B?

GPT Oss 120B requires approximately 65.1 GB of VRAM and supports a context window of 128K tokens. Quantized variants may run on less VRAM; see the Quantized Models section on this page.

Who developed GPT Oss 120B and how large is it?

GPT Oss 120B is developed by openai, a model with 120b 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 GPT Oss 120B?

GPT Oss 120B is hosted on Hugging Face and linked from this page. LLM Explorer also lists quantized variants and similar alternatives if available.

GPT Oss 120B by openai — VRAM 65.1GB, 128K context

Name: GPT Oss 120B
Author: openai

GPT Oss 120B is an open-source language model by openai. Features: 120b LLM, VRAM: 65.1GB, Context: 128K, License: apache-2.0, LLM Explorer Score: 0.46.

Arxiv:2508.10925 8-bit Conversational Deploy:azure Endpoints compatible Eval-results Gpt oss Mxfp4 Region:us Safetensors Sharded Tensorflow Vllm

Model Card on HF 🤗: https://huggingface.co/openai/gpt-oss-120b

GPT Oss 120B Benchmarks

LLME Score: 0.46242

^nn.n% — How the model compares to the reference models: Anthropic Sonnet 3.5 ("so35"), GPT-4o ("gpt4o") or GPT-4 ("gpt4").

What is the LLM Explorer Rank (Score)

GPT Oss 120B Parameters and Internals

LLM Name	GPT Oss 120B
Repository 🤗	https://huggingface.co/openai/gpt-oss-120b
Model Size	120b
Required VRAM	65.1 GB
Updated	2026-07-21
Maintainer	openai
Model Type	gpt_oss
Model Files	4.6 GB: 0-of-14 4.1 GB: 1-of-14 4.6 GB: 2-of-14 4.1 GB: 3-of-14 4.6 GB: 4-of-14 4.1 GB: 5-of-14 4.6 GB: 6-of-14 4.1 GB: 7-of-14 4.6 GB: 8-of-14 4.2 GB: 9-of-14 4.6 GB: 10-of-14 4.1 GB: 11-of-14 4.1 GB: 12-of-14 4.6 GB: 13-of-14 4.1 GB: 14-of-14
Model Architecture	GptOssForCausalLM
License	apache-2.0
Context Length	131072
Model Max Length	131072
Transformers Version	4.55.0.dev0
Tokenizer Class	PreTrainedTokenizerFast
Padding Token	<\|endoftext\|>
Vocabulary Size	201088

Quantized Models of the GPT Oss 120B

Model	Likes	Downloads	VRAM
GPT Oss 120B GGUF	277	184379	65 GB
GPT Oss 120B MLX 8bit	13	37801	123 GB
GPT Oss 120B Unsloth Bnb 4bit	17	11108	62 GB
GPT Oss 120B MXFP4 Q8	17	7308	63 GB
GPT Oss 120B MXFP4 Q4	6	4889	61 GB
GPT Oss 120B 3bit	6	390	113 GB

Best Alternatives to GPT Oss 120B

Best Alternatives	Context / RAM	Downloads	Likes
GPT Oss 120B	128K / 65.1 GB	2742	22
GPT Oss 120B Mxfp4 Bf16	128K / 64.8 GB	1653	2
Medical GPT OSS Swallow 120B	128K / 139.8 GB	47	3
GPT Oss Safeguard 120B	128K / 65.1 GB	2632	98
GPT Oss 120B BF16	128K / 142 GB	8192	8
Scal Lite 60B Code	128K / 34.8 GB	6	2
GPT Oss 120B Dequantized	128K / 135.6 GB	1961	0
GPT Oss 120B MLX 8bit	128K / 123.7 GB	37801	13
GPT Oss 120B Unsloth Bnb 4bit	128K / 62.1 GB	11108	17
GPT Oss 120B MXFP4 Q8	128K / 63.7 GB	7308	17

Rank the GPT Oss 120B Capabilities

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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

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GPT Oss 120B by openai