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ERNIE 4.5 21B A3B Model Specs, Costs & Benchmarks (September 2025)

ERNIE 4.5 21B A3B, developed by Baidu, features a context window of 120K tokens. The model costs $0.07 per million tokens for input and $0.28 per million tokens for output. It was released on August 12, 2025, and has achieved impressive scores in various benchmarks.
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Overview

ERNIE 4.5 21B A3BERNIE 4.5 21B A3B
Model Provider
The organization behind this AI's development
Baidu logoBaidu
Input Context Window
Maximum input tokens this model can process at once
120K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
8K
tokens
Release Date
When this model first became publicly available
August 12th, 2025

Pricing

ERNIE 4.5 21B A3BERNIE 4.5 21B A3B
Input Token Cost
Cost per million input tokens
$0.07
per million tokens
Output Token Cost
Cost per million output tokens
$0.28
per million tokens

Capabilities & Features

ERNIE 4.5 21B A3BERNIE 4.5 21B A3B
Input Types
Supported input formats
text
Output Types
Supported output formats
text
Tokenizer
Text encoding system
Other
Key Features
Advanced capabilities
Standard capabilities only
Open Source
Model availability

Benchmarks

ERNIE 4.5 21B A3BERNIE 4.5 21B A3B
MMLU
Measures knowledge across 57 subjects like law, math, history, and science
Not available
MMMU
Measures understanding of combined text and images across various domains
Not available
HellaSwag
Measures common sense reasoning by having models complete sentences about everyday situations
Not available

Compare This Model

See how ERNIE 4.5 21B A3B compares with other top models