ERNIE 4.5 21B A3B

BaiduMCP Tool Call

baidu/ernie-4.5-21b-a3bOpen Weights

Open ERNIE text MoE with 21B total and 3B active parameters

Benchmark Pricing$0.07 / 1M in$0.28 / 1M out

Context: 131,072 tokens•Max Output: 8,000 tokens•Released: 2025-06-30

TECHNICAL SPECIFICATIONS

Context Window131,072131.1K tokens

Max Output8,0008K tokens

LicenseApache-2.0Self-hostable

Input Modalities

Text

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ ERNIE 4.5 21B A3B natively supports OpenAI / Anthropic format tool calling and is fully compatible with MCP servers and agent loops.

MCP Context Window Recommendations

With a context capacity of 131,072 tokens, this model can handle moderately large MCP tool definitions and multi-turn conversation logs comfortably.

API CALL INVOCATION EXAMPLE

// Example: Calling ERNIE 4.5 21B A3B via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.BAIDU_API_KEY,
});

const response = await client.chat.completions.create({
  model: "baidu/ernie-4.5-21b-a3b",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

console.log(response.choices[0].message.content);