Baidu: ERNIE 4.5 21B A3B Thinking

by Baidu

ERNIE-4.5-21B-A3B-Thinking is Baidu's upgraded lightweight MoE model, refined to boost reasoning depth and quality for top-tier performance in logical puzzles, math, science, coding, text generation, and expert-level academic benchmarks.

Avg Score

54.2%

12 answers

Avg Latency

56.0s

9 runs

Pricing

$0.07

input

$0.28

output

per 1M tokens

Context

131K

tokens

Alternatives

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No alternatives found

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Other Models from Baidu

Compare performance with other models from the same creator

Model	Score	Latency	Cost/1M
Baidu: ERNIE 4.5 VL 424B A47B	77.7%	47.5s	$0.84
Baidu: ERNIE 4.5 300B A47B	76.9%	33.5s	$0.69
Baidu: ERNIE 4.5 21B A3B	54.2%	13.2s	$0.18
Baidu: ERNIE 4.5 VL 28B A3B	44.6%	32.0s	$0.35

Benchmark Performance

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Price vs Performance

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Current model (baseline)

Other models (relative score)

Y-axis shows score difference from shared benchmarks. X-axis uses log scale.

Score Over Time

Performance trends across all benchmark runs

Benchmark Activity

Number of benchmark runs over time

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-thinking",
  messages: [
    {
      role: "user",
      content: "Hello!"
    }
  ]
});

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

Get your API key at openrouter.ai/keys