Baidu: ERNIE 4.5 21B A3B

by Baidu

A sophisticated text-based Mixture-of-Experts (MoE) model featuring 21B total parameters with 3B activated per token, delivering exceptional multimodal understanding and generation through heterogeneous MoE structures and modality-isolated routing. Supporting an extensive 131K token context length, the model achieves efficient inference via multi-expert parallel collaboration and quantization, while advanced post-training techniques including SFT, DPO, and UPO ensure optimized performance across diverse applications with specialized routing and balancing losses for superior task handling.

Avg Score

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Avg Latency

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Pricing

$0.07

input

$0.28

output

per 1M tokens

Context

120K

tokens

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Other Models from Baidu

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Model	Score	Latency	Cost/1M
Baidu: ERNIE 4.5 21B A3B Thinking	—	—	$0.18
Baidu: ERNIE 4.5 VL 28B A3B	—	—	$0.35
Baidu: ERNIE 4.5 VL 424B A47B	—	—	$0.84
Baidu: ERNIE 4.5 300B A47B	—	—	$0.69

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Quickstart

Get started with this model using OpenRouter

View on OpenRouter

import { OpenRouter } from "@openrouter/sdk";

const openrouter = new OpenRouter({
  apiKey: "<OPENROUTER_API_KEY>"
});

const completion = await openrouter.chat.completions.create({
  model: "baidu/ernie-4.5-21b-a3b",
  messages: [
    {
      role: "user",
      content: "Hello!"
    }
  ]
});

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

Get your API key at openrouter.ai/keys