Last refreshed 2026-05-12. Next refresh: weekly.
Why use ERNIE 5.1 on Baidu Qianfan?
Baidu Qianfan offers ERNIE 5.1 with pay-as-you-go pricing at $0.59/1M input tokens. Baidu Qianfan is Baidu Intelligent Cloud's foundation model and Agent development platform, providing hosted API access to ERNIE and Qianfan models for text generation, reasoning, multimodal understanding, embeddings, and agent workflows.
Setup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: ernie-5.1ernie-5.1Request example
ernie-5.1.Gotchas
No curated gotchas have been sourced for this exact provider/model route yet.
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.59 |
| Output tokens | $2.65 |
Capabilities
About ERNIE 5.1
ERNIE 5.1 is Baidu's fifth-generation flagship language model, officially released May 9, 2026. Achieved via disaggregated fully-asynchronous reinforcement learning and scaled agentic post-training, it delivers leading performance at approximately 6% of the pre-training compute cost of comparable models — with roughly one-third the total parameters and half the active parameters of ERNIE 5.0. ERNIE 5.1 ranks #4 globally and #1 among Chinese models on the LMArena Search leaderboard (score: 1,223), with standout performance in legal reasoning, mathematics (AIME26: 99.6), and business domains. API model ID: ernie-5.1. Context: 128K tokens; max output: 65,536 tokens.
FAQ
What does ERNIE 5.1 cost on Baidu Qianfan?
On Baidu Qianfan, ERNIE 5.1 costs $0.59 per 1M input tokens and $2.65 per 1M output tokens.
What is the context window for ERNIE 5.1 on Baidu Qianfan?
ERNIE 5.1 supports a 128k token context window on Baidu Qianfan.
What API model ID do I use for ERNIE 5.1 on Baidu Qianfan?
Use the model ID ernie-5.1 when calling Baidu Qianfan's API.
Who created ERNIE 5.1?
ERNIE 5.1 was created by Baidu AI as part of the ERNIE 5 model family.
Is ERNIE 5.1 open source?
ERNIE 5.1 is not open source; the seed data lists it as proprietary.