ERNIE Bot
The first public ERNIE Bot product milestone, offering invited access and applications for enterprise API testing.
FAMILY / BAIDU
ERNIE / 文心
Baidu’s dialogue, multimodal, and reasoning family, including the ERNIE Bot product line and open-weight ERNIE 4.5 models.
- First model
- 2023
- Models
- 8
- Latest
- ERNIE 5.1
01 / LINEAGE MAP
Model lineage
predecessor derived / sibling
- 2023-03-16ERNIE BotLanguage
- 2023-10-17ERNIE 4.0Language · ReasoningPredecessor · ERNIE Bot
- 2025-03-16ERNIE 4.5Language · MultimodalPredecessor · ERNIE 4.0
- 2025-03-16ERNIE X1Reasoning · AgentSibling · ERNIE 4.5
- 2025-06-30ERNIE 4.5 300B-A47BLanguageSibling · ERNIE 4.5
- 2025-06-30ERNIE 4.5 VL 424B-A47BLanguage · MultimodalSibling · ERNIE 4.5 300B-A47B
- 2025-11-13ERNIE 5.0Language · ReasoningPredecessor · ERNIE 4.5
- 2026-05-09ERNIE 5.1Language · ReasoningPredecessor · ERNIE 5.0Derived from · ERNIE 5.0
02 / GENERATIONS
What changed
ERNIE 4.0
Baidu’s fourth-generation foundation model, improving understanding, generation, reasoning, and memory with invited product testing.
ERNIE 4.5
The hosted multimodal ERNIE 4.5 product model, recorded separately from the concrete weight tiers opened in June without borrowing their parameter counts.
ERNIE X1
ERNIE’s deep-thinking branch, launched alongside ERNIE 4.5 with a focus on reasoning and tool use.
ERNIE 4.5 300B-A47B
The open ERNIE 4.5 text MoE, with 300B total and 47B active parameters under Apache 2.0.
ERNIE 4.5 VL 424B-A47B
The open ERNIE 4.5 vision-language MoE, with 424B total and 47B active parameters, understanding images and video and producing text.
ERNIE 5.0
Baidu’s unified multimodal foundation model jointly modeling text, images, audio, and video, first announced in November 2025.
ERNIE 5.1
Trained from an ERNIE 5.0 submodel structure, reducing model size and training cost while improving reasoning, agents, and creative writing.