Baidu
Baidu ERNIE 5.1
Baidu ERNIE 5.1 is a Baidu model with 64K context, $0.59 in / $2.65 out per million tokens, last verified September 2, 2026. Open weights: no. Public-board scores are linked to the publisher; vendor-only figures stay in the watch-out, not on the board.
ERNIE 5.1 is Baidu's closed flagship with ~800B params and strong Chinese-language performance.
Catalog record checked September 2, 2026Individual provider fields may change
| Specification | Baidu ERNIE 5.1 |
|---|---|
| Provider | Baidu |
| Tier | Balanced |
| Context window | 64K |
| Max output | Not verifiedUnverified |
| Input / 1M tokens | $0.59 |
| Output / 1M tokens | $2.65 |
| Weights | Closed |
| Parameters | ~800B |
| Reasoning levels | low, medium, high |
| Modalities | text, image |
| API model id | ernie-5.1 |
| Released | May 9, 2026 |
Pricing tiers: $0.59 input / ~$2.65 output per MTok via Qianfan (output single-source; official USD list not retrievable). Context per Qianfan console: 64K.
Verified evidence
Published benchmark results
Each result keeps its source and measurement date visible. A missing benchmark is not treated as a zero.
| Benchmark | Score | Measured | Source |
|---|---|---|---|
| Artificial Analysis Intelligence Index | 48 | 2026-08-14 | Artificial Analysis · View source |
Best for
- Chinese-language work
- Enterprise (China)
- Multimodal
Watch out
Source receipts
Catalog figures for this model were checked against the following sources.
- Baidu — ERNIE 5.1 (accessed 2026-08-29)
- HowAIWorks — ERNIE 5.1 (accessed 2026-08-29)
Common questions
Baidu ERNIE 5.1
Answered from the verified figures on this page rather than general guidance.
How much does Baidu ERNIE 5.1 cost per million tokens?
Baidu ERNIE 5.1 is listed at $0.59 per million input tokens and $2.65 per million output tokens at standard rates. Output tokens usually dominate real bills, so weigh the output rate more heavily than the input rate. $0.59 input / ~$2.65 output per MTok via Qianfan (output single-source; official USD list not retrievable). Context per Qianfan console: 64K.
What is Baidu ERNIE 5.1's context window?
Baidu ERNIE 5.1 accepts about 64K tokens of context. That only matters if you routinely send very long documents, large codebases, or multi-turn histories that approach that limit.
What is Baidu ERNIE 5.1 best for?
Baidu ERNIE 5.1 is a balanced tier from Baidu. It suits chinese-language work, enterprise (china), multimodal. Closed API; weights not published.