ERNIE 4.5 300B-A47B is Baidu's largest open-source model — 300 billion total parameters, 47B active, representing Baidu's decade of AI investment distilled into the most capable Chinese-language model ever trained.
ERNIE 4.5 300B-A47B is an AI model released 2025 by Baidu, a leading organization in large language model research. Baidu's flagship ERNIE — 300B MoE with elite Chinese language capabilities and broad reasoning. With 300B total (47B active via MoE) and a 128K tokens context window, ERNIE 4.5 300B-A47B is designed to excel across a range of demanding tasks — from software engineering and mathematical problem-solving to multilingual content generation and long-document analysis.
ERNIE 4.5 300B-A47B employs a Mixture-of-Experts (MoE) architecture with 300B total (47B active via MoE). In a MoE design, only a subset of "expert" sub-networks activates for each token during inference — ERNIE 4.5 300B-A47B has 300B total (47B active via MoE) total parameters but uses only a fraction per token. This allows the model to store significantly more learned knowledge than a comparably-priced dense model. MoE architectures have proven effective at reaching frontier-level capability while keeping serving costs manageable — a key reason ERNIE 4.5 300B-A47B can be offered at the scale that platforms like LITHOVEX AI make possible.
As of 2026-10-16, ERNIE 4.5 300B-A47B by Baidu demonstrates measurable performance on standard AI evaluation benchmarks. On CMMLU (Chinese) — which tests world knowledge across 57 academic subjects from elementary to professional level — it achieves 88.5%. These scores place ERNIE 4.5 300B-A47B — at 300B total (47B active via MoE) of parameters — in a competitive position within its model class. Note that benchmark scores reflect controlled evaluation conditions; real-world performance varies by task, prompt design, and domain specificity.
The primary strengths of ERNIE 4.5 300B-A47B are: China's most capable open-weight model for Chinese-language tasks; MoE efficiency: 300B knowledge at 47B cost; Baidu's Chinese internet data — superior Chinese understanding. These make it particularly well-suited for Enterprises serving Chinese domestic market, Chinese government and enterprise AI, Chinese-language healthcare, legal, and financial document analysis. Users working on complex, multi-step problems benefit most from ERNIE 4.5 300B-A47B's ability to maintain coherence across long inputs and produce structured, verifiable outputs.
Like all current AI systems, ERNIE 4.5 300B-A47B has limitations: English below more specialized models; China-specific license terms. For production deployments, validating outputs against authoritative sources — especially for domain-specific or time-sensitive information — remains best practice. Baidu continues to improve ERNIE 4.5 300B-A47B through ongoing research.
ERNIE 4.5 300B-A47B is available on LITHOVEX AI with a free account. Unlike direct API access — which requires billing setup, API key management, and per-token charges — LITHOVEX AI provides a seamless browser interface with no setup required, making ERNIE 4.5 300B-A47B accessible to students, researchers, developers, and early-stage teams globally.
As of 2026-10-16, ERNIE 4.5 300B-A47B by Baidu demonstrates measurable performance on standard AI evaluation benchmarks. On CMMLU (Chinese) — which tests world knowledge across 57 academic subjects from elementary to professional level — it achieves 88.5%. These scores place ERNIE 4.5 300B-A47B — at 300B total (47B active via MoE) of parameters — in a competitive position within its model class. Note that benchmark scores reflect controlled evaluation conditions; real-world performance varies by task, prompt design, and domain specificity.
Mixture-of-Experts: 300B total / 47B active, Chinese-optimized
The training pipeline for ERNIE 4.5 300B-A47B involves multiple stages: large-scale pretraining on diverse multilingual text and code corpora to develop broad world knowledge, followed by supervised fine-tuning on instruction-response pairs, and alignment techniques such as RLHF or DPO. Each stage refines the model's helpfulness, accuracy, and safety. Baidu's research team — based in China — has optimized ERNIE 4.5 300B-A47B for the specific capability profile described above.
Inference efficiency: ERNIE 4.5 300B-A47B at 300B total (47B active via MoE) is designed to deliver quality outputs at practical serving speeds. Its 128K tokens context window enables processing entire documents, multi-file codebases, and extended conversation histories — particularly valuable for contract review, technical documentation analysis, and codebase-level AI assistance.
Getting started with ERNIE 4.5 300B-A47B on LITHOVEX AI takes under two minutes. Follow these steps:
For best results with ERNIE 4.5 300B-A47B: provide specific, context-rich prompts; include examples when generating code; specify output format when structure matters; break complex tasks into focused sub-questions.
Frontier Chinese-language AI for government and enterprise
Maximum-quality Chinese content generation and analysis
State-of-the-art bilingual research assistance
Chinese legal and regulatory analysis at frontier quality
Integration with Chinese internet knowledge bases at scale
Baidu is China's leading search engine and one of the first Chinese tech giants to invest heavily in AI, establishing its AI research center in Silicon Valley in 2013 under Andrew Ng. The ERNIE (Enhanced Representation through Knowledge Integration) model family, now at version 4.5, represents Baidu's flagship open-weight contributions. ERNIE models are optimized for Chinese-language understanding and generation, leveraging access to Chinese internet-scale training data. The ERNIE 4.5 family includes both dense and MoE variants, with the flagship reaching 300 billion total parameters. Baidu's AI products serve hundreds of millions of Chinese users through Baidu Search, ERNIE Bot, and enterprise APIs.
Funding: Public company (NASDAQ: BIDU, $30B+ market cap)
Founded: 2000, headquartered in China.
ERNIE 4.5 300B-A47B by Baidu competes in a field with several strong alternatives. Below is a detailed side-by-side comparison against commonly listed alternatives, using benchmark data and capability profiles in the catalog.
Both ERNIE 4.5 300B-A47B and the models above are available free on LITHOVEX AI — test them side by side on your real tasks before committing to a subscription with any provider.
ERNIE 4.5 300B-A47B is released under ERNIE Model License, which means you can download and run it on your own hardware. Below are the quickest ways to get started.
LITHOVEX AI runs ERNIE 4.5 300B-A47B on cloud infrastructure, so you can use it instantly in your browser without downloading anything, configuring drivers, or managing VRAM. Create a free account and start in under 60 seconds.
ERNIE 4.5 300B-A47B is a landmark for Chinese AI: the largest open-weight model trained on Chinese internet-scale data, reflecting Baidu's access to the world's largest Chinese-language training corpus through its Search dominance.
ERNIE 4.5 300B-A47B by Baidu has the following version history and notable updates:
For the complete changelog and latest release notes, visit the official Baidu model page.