Baidu: ERNIE 4.5 21B A3B Thinking

BaiduID: baidu/ernie-4.5-21b-a3b-thinking

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.

Pricing per 1M Tokens

Input (Prompt)$0.07
Output (Completion)$0.28
Cache ReadFree
Cache WriteFree
ImageN/A

Specifications

Context Length131K
Max Output Tokens66K
Input ModalitiesText
Output ModalitiesText
TokenizerOther
Instruct TypeN/A
Top Provider Context131K
Top Provider Max Output66K
ModeratedNo

Compare this model

See how Baidu: ERNIE 4.5 21B A3B Thinking stacks up against other models.

vs Baidu: ERNIE 4.5 21B A3Bvs Baidu: ERNIE 4.5 VL 28B A3Bvs Baidu: ERNIE 4.5 VL 424B A47B vs Baidu: ERNIE 4.5 300B A47B

More from Baidu

Baidu: ERNIE 4.5 21B A3B
Input$0.07
Context120K
Baidu: ERNIE 4.5 VL 28B A3B
Input$0.14
Context30K
Baidu: ERNIE 4.5 VL 424B A47B
Input$0.42
Context123K
Baidu: ERNIE 4.5 300B A47B
Input$0.28
Context123K

Last updated: March 23, 2026

First tracked: March 23, 2026