ERNIE 4.5 21B A3B Thinking

Name: ERNIE 4.5 21B A3B Thinking
Brand: Baidu

21B

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.

Chat with ERNIE 4.5 21B A3B Thinking

Input Price$0.00/1M tokens

Output Price$0.00/1M tokens

Intelligence29.1

Coding29.2

Specifications

Technical details and pricing.

ProviderBaidu

Context Window131,072 tokens

Release DateNov 13, 2025

ModalitiesText

Benchmarks

10 benchmark scores from Artificial Analysis.

GPQA77.7%

MMLU Pro83.0%

HLE12.7%

LiveCodeBench81.2%

AIME 202585.0%

SciCode37.5%

LCR6.7%

IFBench41.4%

Tau283.9%

TerminalBench Hard25.0%

Composite Indices

Intelligence, Coding, Math

Standard Benchmarks

Academic and industry benchmarks

Frequently Asked Questions

What is ERNIE 4.5 21B A3B Thinking good for?

Use ERNIE 4.5 21B A3B Thinking for everyday tasks like writing, summarizing, brainstorming, and getting clear explanations.

How much does ERNIE 4.5 21B A3B Thinking cost?

Pricing is based on usage. Current rates are $0.00/1M tokens for input and $0.00/1M tokens for output.

Can I try ERNIE 4.5 21B A3B Thinking for free?

Yes. You can start a chat instantly and test the model before deciding on a plan.

Does ERNIE 4.5 21B A3B Thinking support images or audio?

ERNIE 4.5 21B A3B Thinking focuses on text-based tasks.

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Benchmarks and pricing are sourced from Artificial Analysis where available. OpenRouter specs are used as a fallback.