Baidu Wenxin X1 is the latest deep inference model of Baidu Wenxin Yiyan series, based on the ERNIE architecture. Strengthened logical reasoning, mathematical solution and code generation capabilities, and deeply optimized in Chinese scenes. Supports multi-turn dialogue, ultra-long context understanding and multi-modal input.

baiduwenxinx1

Core parameters and statistics

Parameters	Official verifiable information
Product Positioning	Deep Inference Large Language Model
Architecture	Baidu self-developed ERNIE
Core competencies	Logical reasoning, mathematical solution, code generation, long text understanding
Context length	Extra long context (specific values are subject to official documents)
Multi-modal	Support image and text understanding input
Language	Chinese in-depth optimization
Access method	Web (Wen Xinyiyan), App, API (Qianfan Platform)
Developer	Baidu (Baidu)

A brief comment in one sentence: Wenxin X1 is not a general-purpose chat robot, but a model version specially optimized by Baidu in the direction of deep reasoning, which is suitable for scenarios that require rigorous logical reasoning.

User and market recognition

Gradually build user awareness in the field, and product capabilities are used by content creators and teams to improve work efficiency. Some industry users have incorporated it into their daily workflow. It is recommended to refer to the latest official disclosures for specific user scale and industry adoption rate data.

Cost advantage

C client/Personal: Free use of basic conversation functions through Wen Xin Yi Yan App and Web client. The advanced inference function may have a limit on the number of calls, which is subject to the client's real-time page.

API/Developer: Access through Baidu Qianfan large model platform (qianfan.cloud.baidu.com). Billed based on token amount and model specifications. As a high-end reasoning model, the unit price of X1 is higher than that of basic dialogue models. Supports both prepaid and postpaid modes.

Enterprise/Privatization: Supports privatization deployment (Baidu Baige Platform), suitable for industries with high data compliance requirements (finance, government affairs, medical care). You need to contact Baidu Business to obtain a customized quotation. Deployment solutions include model privatization and full-stack privatization.

Main functions

• Deep Reasoning and Chain-of-Thought: The X1 version strengthens the multi-step logical reasoning ability, and realizes step-by-step solving of mathematical problems, code logic analysis and scientific reasoning through Chain-of-Thought technology. Compared with the previous generation model, it has significantly improved on mathematical benchmarks such as GSM8K and MATH.
• Extra-long text understanding: Supports ultra-long context input, and can process multi-page content such as long papers, technical documents, legal contracts, etc. at one time. Stable performance in long text information extraction and summary scenarios.
• Code Generation and Understanding: Supports code generation, debugging and interpretation of mainstream languages ​​such as Python, Java, C++, and JavaScript. Able to understand code logic and give optimization suggestions.
• Multi-modal understanding: Supports image input understanding, can analyze charts, screenshots, and photo content, and make inferences and answers based on visual information.
• Internet search: Integrated Baidu search capabilities, real-time network information can be quoted in answers, suitable for query scenarios that require timeliness.

Model and version evolution

Continuous iterative updates, the latest version introduces performance optimization and new features. Historical version information can be viewed on the official release page. There is no complete public version evolution timeline yet. It is recommended to pay attention to the official announcement to understand the rhythm of feature updates.

Technical advantages

Main type judgment: Basic large model/API infrastructure - deep reasoning large language model.

Based on Baidu's self-developed ERNIE (Enhanced Representation through kNowledge Integration) architecture, it has undergone large-scale pre-training and RLHF alignment on Chinese corpus. The core technical difference of the X1 version lies in the optimization of the depth and breadth of the thinking chain during reasoning - the model will conduct multi-step internal reasoning verification before generating the final answer, reducing illusions and logical errors. In the Chinese scenario, the accuracy of understanding culturally specific content such as idioms, ancient poems, and professional terms is significantly better than the general English model of the same parameter scale.

How to use

Entrance	Description
Web	Visit yiyan.baidu.com and register a Baidu account to use
App	Search "Wen Xin Yi Yan" in the app store to download
API	Access through Baidu Qianfan platform qianfan.cloud.baidu.com
Privatization	Contact Baidu Business to obtain Baige platform deployment plan

Product Pricing

The pricing model is subject to the official real-time page. Usually a freemium or subscription system is used, and basic functions can be used for free. Advanced functions or high-frequency use require paid subscriptions, and users are advised to evaluate the optimal solution based on actual usage.

Application scenarios

• Academic research and paper writing: literature review, experimental data analysis, paper polishing and reference compilation. The long context capability is suitable for loading multiple papers at once for comparative analysis.
• Programming assistance and debugging: Code generation bug location, code review and refactoring suggestions. Deep reasoning capabilities are suitable for complex algorithm design and logic verification.
• Legal and Financial Analysis: Contract clause review, legal document drafting, financial data analysis and report generation. Scenarios that require high accuracy and logical rigor.
• Educational Counseling: Step-by-step analysis of math problems, programming teaching, and knowledge questions and answers. The thinking chain output process can help students understand problem-solving ideas.

Applicable people

• Researchers and Students: Academic work requiring deep reasoning and long document processing capabilities.
• Developer: Software engineers who need assistance with code generation and debugging.
• Professionals: Lawyers, financial analysts and other knowledge workers who need to deal with long documents and complex reasoning.
• Not suitable for people: Users who only need simple Q&A or chatting (X1’s reasoning ability is overmatched in this scenario, just use the basic version); users who mainly need non-Chinese scenarios (English skills are not as good as English native models of the same scale).

Summary and Outlook

Wenxin X1 is Baidu’s important product iteration in the direction of deep reasoning. Logical reasoning and long text processing capabilities in Chinese scenarios are its core strengths.

Unfit boundary: Non-Chinese scene coverage is limited; the inference latency of the deep inference model is higher than that of the basic dialogue model; the API cost is higher than that of the basic model; some advanced features require payment.

Purchase Suggestion: C-end users can try Wenxinyiyan App for free to confirm that the reasoning ability meets their needs. Developers first apply for a trial API on the Qianfan platform, and decide whether to purchase it after evaluating the inference quality and latency. Enterprise privatization deployment needs to evaluate the hardware and operation and maintenance costs of the Baige platform in advance.

Related tools: deepseek, chatgpt

Version Info

• Wen Xin Yi Yan X1 ：The enhanced version of deep reasoning strengthens logical reasoning, mathematics and coding capabilities, and supports ultra-long contexts. （~2026-01）
• Wen Xin Yi Yan ERNIE 4.0 ：Previous version, basic dialogue and text generation capabilities. （~2025-06）