Wanzhi

Wanzhi is a free all-in-one AI assistant that integrates long-document reading, AI-powered PPT generation, web search Q&A, and image creation. Its document reader supports files up to 5 million words, with side-by-side views for cross-referencing and the ability to ask questions about charts by simply taking a screenshot. The AI PPT feature produces a complete slide deck with outlines, images, and various templates in about two minutes, and allows uploading of reference templates for customization.

Its key strengths: completely free with no usage limits; accessible on both web and WeChat Mini Program; smooth performance when switching to DeepSeek-R1 model; bilingual support; large 5M-word context window; and coverage of common office tasks such as reading papers, generating weekly reports, and interpreting financial statements.

Weaknesses: the PPT templates are limited and sometimes lack polish; data accuracy can be an issue — a test found fabricated numbers in earnings reports; output depth may lag behind competitors like Kimi. The service is currently free, but the company offers a paid API, so future premium tiers are possible.