ERNIE
Baidu's family, served through Qianfan.
At a glance
Current release
From the release row ERNIE 5.1. Inputs up to 32K tokens; 32K-128K inputs are $0.84 / $3.10.
Family record: Press release · 5 Sep 2026
Built on it
1 product in this catalogue names this family on their own pages.
Releases
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ERNIE
First ERNIE (Enhanced Representation through Knowledge Integration): a BERT-style Chinese model with entity- and phrase-level masking, claimed to beat BERT on Chinese NLP benchmarks.
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ERNIE 3.0
10B-parameter model fusing auto-regressive and auto-encoding networks trained on 4TB of text plus a knowledge graph, claimed to surpass human performance on SuperGLUE.
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ERNIE Bot
Baidu's first chatbot product, built on ERNIE and PLATO, presented with literary creation, business writing, maths, Chinese understanding and multi-modal generation.
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ERNIE 4.0
Presented at Baidu World as the most advanced ERNIE foundation model, with upgraded understanding, generation, reasoning and memory to power AI-native applications.
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ERNIE 4.5
Native multimodal foundation model, free to individuals in ERNIE Bot and priced from RMB 0.004 per 1K input tokens via API; ERNIE 4.5 Turbo followed 2025-04-25.
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ERNIE X1
Baidu's first deep-thinking reasoning model with tool use, launched alongside ERNIE 4.5 at half its price; X1 Turbo followed 2025-04-25 and X1.1 on 2025-09-09.
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ERNIE 4.5 (open-source family)
Ten open-weight ERNIE 4.5 models from 0.3B to 424B under Apache 2.0, MoE text and vision-language variants, 131K context on the 300B-A47B text model.
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ERNIE 5.0
Natively omni-modal 2.4T-parameter model jointly handling text, image, audio and video, in public preview via ERNIE Bot and Qianfan; the full-release blog followed 2026-02-06.
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ERNIE 5.1
Compresses total parameters to about a third of ERNIE 5.0 while claiming leading performance at lower cost; preceded by ERNIE-5.1-Preview on LMArena 2026-04-30.