ERNIE 5.1

Baidu ERNIE 5.1 text generation model on the Qianfan platform.

Baiduernie-5.12026-05-09Report incorrect data

Specs

Context: 131.1K
Max output: 65.5K
Input price: ¥4/ 1M tokens
Output price: ¥18/ 1M tokens
Released: 2026-05-09

Context

Context window: 131.1K
Max input: 121.9K
Max output: 65.5K

Pricing · CNY / 1M tokens

Input: ¥4
Output: ¥18
Cache read: —
Cache write: —

Modalities

Input: Text
Output: Text

API

API types: chatmessages

Reasoning

Not published

Info

Status: Active
Released: 2026-05-09
Knowledge cutoff: —

Features

Confirmed: streaming

How to call

baidumodel = ernie-5.1

chat

POSThttps://qianfan.baidubce.com/v2/chat/completions

messages

POSThttps://qianfan.baidubce.com/anthropic/v1/messages

JSON

ernie-5.1.json

{
  "id": "ernie-5.1",
  "object": "model",
  "created": 1778284800,
  "owned_by": "baidu",
  "name": "ERNIE 5.1",
  "api": {
    "types": [
      "chat",
      "messages"
    ]
  },
  "limits": {
    "context": 131072,
    "input": 121856,
    "output": 65536
  },
  "modalities": {
    "input": [
      "text"
    ],
    "output": [
      "text"
    ]
  },
  "reasoning": {
    "supported": null,
    "efforts": []
  },
  "pricing": {
    "currency": "CNY",
    "unit": "1M_tokens",
    "input": 4,
    "output": 18,
    "cache_read": null,
    "cache_write": null
  },
  "features": [
    "streaming"
  ],
  "info": {
    "status": "active",
    "release_date": "2026-05-09",
    "knowledge_cutoff": null,
    "description": "Baidu ERNIE 5.1 text generation model on the Qianfan platform.",
    "docs": "https://cloud.baidu.com/doc/qianfan/s/rmh4stp0j",
    "verified_at": "2026-10-11"
  }
}

Official sources