ERNIE 4.5 21B A3B Thinking

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.

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Capabilities

Extended Thinking

Example Use Cases

Budget reasoning for math or science

Lightweight thinking model

Logical puzzles on a budget

Technical Specifications

Context Window

131,072 tokens

Max Output

65,536 tokens

Cache Miss Cost

$0.07 per 1M tokens

Non-Reasoning Cost

$0.28 per 1M tokens

Web Search Cost

$15 per 1K calls

Code Execution Cost

$0.19 per 1K calls

⚠️ Legacy

Made legacy on

Reason

Untested

Recommended Replacement

Qwen3.5 Plus