What are the hardware requirements for ERNIE 4.5 21B A3B Thinking?

ERNIE 4.5 21B A3B Thinking requires approximately 43.7 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 ERNIE 4.5 21B A3B Thinking and how large is it?

ERNIE 4.5 21B A3B Thinking is developed by baidu, a model with 21b 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 ERNIE 4.5 21B A3B Thinking?

ERNIE 4.5 21B A3B Thinking is hosted on Hugging Face and linked from this page. LLM Explorer also lists quantized variants and similar alternatives if available.

ERNIE 4.5 21B A3B Thinking by baidu — VRAM 43.7GB, 128K context

Name: ERNIE 4.5 21B A3B Thinking
Author: baidu

ERNIE 4.5 21B A3B Thinking is an open-source language model by baidu. Features: 21b LLM, VRAM: 43.7GB, Context: 128K, License: apache-2.0, LLM Explorer Score: 0.3.

Conversational Deploy:azure En Endpoints compatible Ernie4.5 Ernie4 5 moe Region:us Safetensors Sharded Tensorflow Zh

Model Card on HF 🤗: https://huggingface.co/baidu/ERNIE-4.5-21B-A3B-Thinking

ERNIE 4.5 21B A3B Thinking Parameters and Internals

LLM Name	ERNIE 4.5 21B A3B Thinking
Repository 🤗	https://huggingface.co/baidu/ERNIE-4.5-21B-A3B-Thinking
Model Size	21b
Required VRAM	43.7 GB
Updated	2026-06-24
Maintainer	baidu
Model Type	ernie4_5_moe
Model Files	5.0 GB: 1-of-9 5.0 GB: 2-of-9 5.0 GB: 3-of-9 5.0 GB: 4-of-9 5.0 GB: 5-of-9 5.0 GB: 6-of-9 5.0 GB: 7-of-9 5.0 GB: 8-of-9 3.7 GB: 9-of-9
Supported Languages	en zh
Model Architecture	Ernie4_5_MoeForCausalLM
License	apache-2.0
Context Length	131072
Model Max Length	131072
Tokenizer Class	LlamaTokenizer
Padding Token	<unk>
Vocabulary Size	103424
Torch Data Type	bfloat16

Rank the ERNIE 4.5 21B A3B Thinking 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 ERNIE 4.5 21B A3B Thinking

Best Alternatives	Context / RAM	Downloads	Likes
ERNIE 4.5 21B A3B PT	128K / 44 GB	50007	175
... Claude 4.5 High OPUS Thinking	128K / 43.7 GB	24	3
ERNIE 4.5 21B A3B PT	128K / 44 GB	21	1
ERNIE 4.5 21B A3B Base PT	128K / 43.9 GB	788	36
ERNIE 4.5 21B A3B Thinking	128K / 43.7 GB	110	11
ERNIE 4.5 21B A3B Paddle	128K / 44 GB	47	18
ERNIE 4.5 21B A3B Base Paddle	128K / 44.2 GB	38	15
ERNIE 4.5 21B A3B PT Bf16	128K / 43.7 GB	19	1
ERNIE 4.5 21B A3B PT 8bit	128K / 23.2 GB	36	2

Note: green Score (e.g. "73.2") means that the model is better than baidu/ERNIE-4.5-21B-A3B-Thinking.