Baidu: ERNIE 4.5 21B A3B Thinking API

Access Baidu: ERNIE 4.5 21B A3B Thinking from Baidu using Puter.js AI API.

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Model Card

ERNIE 4.5 21B A3B Thinking is Baidu's reasoning-enhanced language model built on the 21B A3B architecture with explicit chain-of-thought capabilities. It activates only 3B of its 21B parameters per token while specializing in logic, mathematics, coding, and multi-step reasoning tasks. The model supports extended context up to 131K tokens and is optimized for complex problem-solving through structured thinking.

Context Window N/A

tokens

Max Output 66K

tokens

Input Cost $0.07

per million tokens

Output Cost $0.28

per million tokens

Release Date Jun 30, 2025

 

API Usage Example

Add Baidu: ERNIE 4.5 21B A3B Thinking to your app with just a few lines of code.
No API keys, no backend, no configuration required.

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

puter.ai.chat("Explain quantum computing in simple terms", {
    model: "baidu/ernie-4.5-21b-a3b-thinking"
}).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", {
            model: "baidu/ernie-4.5-21b-a3b-thinking"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this Baidu: ERNIE 4.5 21B A3B Thinking API about?

The Baidu: ERNIE 4.5 21B A3B Thinking API gives you access to Baidu's chat model through Puter.js. With just a few lines of JavaScript, you can integrate Baidu: ERNIE 4.5 21B A3B Thinking into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created Baidu: ERNIE 4.5 21B A3B Thinking?

Baidu: ERNIE 4.5 21B A3B Thinking was created by Baidu and released on Jun 30, 2025.

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

Baidu: ERNIE 4.5 21B A3B Thinking can generate up to 66K tokens in a single response.

How much does it cost?
The Baidu: ERNIE 4.5 21B A3B Thinking API is available through the User-Pays Model. As a developer, you can add the Baidu: ERNIE 4.5 21B A3B Thinking API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$0.07
Output$0.28
How do I access the Baidu: ERNIE 4.5 21B A3B Thinking API?

You can access the Baidu: ERNIE 4.5 21B A3B Thinking API with just a few lines of JavaScript — no API keys, no backend, and no configuration required. Include the Puter.js library in your project and start making calls right away. For more details, check out our documentation.

Does the Baidu: ERNIE 4.5 21B A3B Thinking API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Baidu: ERNIE 4.5 21B A3B Thinking 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 Baidu: ERNIE 4.5 21B A3B Thinking to your app without worrying about API keys or setup.

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