Baidu: ERNIE 4.5 21B A3B

This model is no longer available.

Add AI to your application with Puter.js.

Explore Other Models

Model Card

ERNIE 4.5 21B A3B is a lightweight text-only language model from Baidu using a Mixture-of-Experts architecture with 21B total parameters but only 3B active per token. It excels at general language understanding, generation, reasoning, and coding tasks while remaining computationally efficient. Released under Apache 2.0, it achieves competitive performance against larger models like Qwen3-30B-A3B despite having 30% fewer total parameters.

Context Window 131K

tokens

Max Output 8K

tokens

Input Cost $0.07

per million tokens

Output Cost $0.28

per million tokens

Release Date Aug 12, 2025

Code Example

Add AI to your app with the Puter.js AI API, no API keys or setup required.

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms").then(response => {
    document.body.innerHTML = response.message.content;
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.chat("Explain quantum computing in simple terms").then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

Frequently Asked Questions

How do I use ERNIE 4.5 21B A3B?

ERNIE 4.5 21B A3B is no longer available through Puter.js. Explore other AI models for alternatives.

What is the pricing for ERNIE 4.5 21B A3B?

ERNIE 4.5 21B A3B costs $0.07 per 1M input tokens and $0.28 per 1M output tokens.

	Price per 1M tokens
Input	$0.07
Output	$0.28

Who created ERNIE 4.5 21B A3B?

ERNIE 4.5 21B A3B was created by Baidu and released on Aug 12, 2025.

What is the context window of ERNIE 4.5 21B A3B?

ERNIE 4.5 21B A3B supports a context window of 131K tokens. For reference, that is roughly equivalent to 262 pages of text.

What is the max output length of ERNIE 4.5 21B A3B?

ERNIE 4.5 21B A3B can generate up to 8K tokens in a single response.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the ERNIE 4.5 21B A3B API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.

Get started with Puter.js

Add AI to your application without worrying about API keys or setup.

Explore Models View Tutorials