Baidu general AI assistant providing chat, content creation and web search, powered by the ERNIE model family.
Baidu's consumer assistant is now branded simply as 文心 (Wenxin) in its Chinese app listings, while the underlying model family and international-facing model brand remain ERNIE. The current product is much broader than the original ERNIE Bot chat experience: the web, desktop and mobile service combines multimodal search, Chinese writing and rewriting, image and video creation, video calls with dialect recognition, document input, AI-generated presentations and a newer task-delegation mode that plans and executes multi-step work.12
ERNIE 5.1 is the current flagship model generation. Baidu released it in May 2026 with an emphasis on agentic post-training, reasoning, search and creative work, and directs users to the ERNIE site to chat with the latest model.3 Baidu's current Qianfan model documentation exposes `ernie-5.1` with a 128K context window, up to 119K input tokens and up to 65,536 output tokens.4
The consumer product and API should not be collapsed into one surface. Wenxin adds Baidu search, UI workflows, files, creative tools and task delegation around the model, while Qianfan is the developer/enterprise access layer. The app's current feature list is particularly strong for China-oriented productivity: it can search across text, voice, images, video and documents, generate or refine Chinese business and teaching material, create PPTs, import files from WeChat conversations and perform multimodal creative tasks.2
For developers, ERNIE 5.1 is available through Baidu AI Cloud Qianfan. Current July 2026 domestic pricing is RMB 0.004 per thousand input tokens and RMB 0.018 per thousand output tokens when input is at most 32K — equivalent to RMB 4 and RMB 18 per million tokens. For input between 32K and 128K, pricing rises to RMB 6 per million input tokens and RMB 22 per million output tokens.5 That is inexpensive enough to make ERNIE credible for high-volume Chinese-language workloads, although enterprise buyers also need to price hosting, tools, retrieval and governance rather than only raw tokens.
Access is strongest in China. Baidu's current product site provides web plus iOS, Android, Windows and macOS access.1 The same app exists in international App Store regions, but the experience is clearly China-first. This matters because an app being technically downloadable outside China is not the same as a globally localized product with equivalent support, identity, payment and content expectations.
Current independent benchmark evidence paints a more nuanced picture than Baidu's launch claims. On LM Arena's August 21 no-style-control Text Arena view, ERNIE 5.1 scored 1468 ±5, placing Baidu eighth among labs and the model 24th in that view.6 On the August 24 Search Arena, however, ERNIE 5.1 scored 1227 ±10 and ranked sixth from 3,788 votes — a materially stronger relative showing and consistent with search being one of the product's core strengths.7
That evidence supports “strong and competitive,” not “current global frontier leader.” Reuters reported on August 18 that Baidu CEO Robin Li had vowed to bring ERNIE back to the AI frontier, noting that the model had gone months without a major upgrade while competitors continued shipping newer generations.8 This does not make ERNIE 5.1 weak; it does mean older claims that it was the top Chinese or top-ten global model should not be frozen into the current review after leaderboards and competitors have moved.
Consumer ratings also vary sharply by region. The current China App Store surface is about 4.2/5 from roughly 19,000 ratings, while the US surface is about 2.6/5 from roughly 162 ratings.29 The US sample is much smaller and many written complaints are older, so the two numbers should not be pooled. Still, the gap reinforces the product's China-first character rather than providing a clean universal satisfaction score.
Baidu's privacy documentation is detailed, but the product is data-intensive. Wenxin records text, voice and image conversation inputs to provide the service and says conversation information is also used to improve the system's understanding and response quality. Depending on features and permissions it may process device identifiers, network information, IP address, installed-app information, Wi-Fi identifiers, location, camera, microphone and files.10 The policy states that personal information is stored within mainland China and is not provided abroad. For ordinary consumer use this is a disclosed product choice; for confidential, regulated or cross-border work it is a material governance constraint.10
Wenxin is strongest for Chinese-speaking users who want a free assistant woven around search and local productivity rather than a bare model endpoint. Students, writers and office users get unusually broad Chinese-language workflows in one app, while Baidu ecosystem users benefit from features such as search grounding, location-aware functions and WeChat-file ingestion.21
It is also relevant to Chinese developers and enterprises. Qianfan provides a current ERNIE 5.1 API with long context and usage-based pricing, so teams can build on the same model family without depending on the consumer interface.45
It is a weaker default for users who need a fully international product, organizations with strict cross-border data-residency requirements, and buyers whose primary criterion is access to the absolute newest global frontier model. Those users should treat the consumer app, the ERNIE 5.1 model and Qianfan as distinct procurement surfaces rather than assuming that strengths in one automatically transfer to the others.
Products matched by shared tasks, audience, workflow, product type and capabilities.