ERNIE 4.5 21B A3B Thinking vs GPT-5.1
Baidu vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •ERNIE 4.5 21B A3B Thinking is cheaper ($0.07 vs $1.25 per 1M input)
- •GPT-5.1 has a larger context window (400K)
| ERNIE 4.5 21B A3B Thinking | GPT-5.1 | |
|---|---|---|
| Intelligence index | — | 89 |
| Developer | Baidu | OpenAI |
| Type | LLM | LLM |
| Access | Open weights | API only |
| Context window | 131,072 tokens | 400,000 tokens |
| Input price | $0.07 / 1M | $1.25 / 1M |
| Output price | $0.28 / 1M | $10.00 / 1M |
| Speed | — | 115 tok/s |
| Released | October 9, 2025 | November 12, 2025 |
| Parameters | — | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |