The Zero & All Things Large Model Open Platform is a platform that provides access to high-quality Zero & All Things large models through API calls. The Yi series models are based on the cutting-edge research achievements and high-quality data training of Zero & All Things, and have achieved SOTA performance on multiple authoritative lists. The main products include yi-34b-chat-0205, yi-34b-chat-200k, and yi-vl-plus models. yi-34b-chat-0205 is an optimized chat model with an improved instruction compliance ability by nearly 30%, significantly reduced response latency, suitable for chat, Q&A, and dialogue scenarios. yi-34b-chat-200k supports up to 200K long contexts and can process content of approximately 200,000 to 300,000 Chinese characters, suitable for document understanding, data analysis, and cross-domain knowledge application. yi-vl-plus supports high-resolution image input and possesses capabilities of image Q&A, chart understanding, OCR, and is suitable for analyzing, recognizing, and understanding complex image content. The API advantages of this platform include fast inference speed and full compatibility with the OpenAI API. In terms of pricing, new registered users receive a 60 yuan trial amount, yi-34b-chat-0205 is priced at 2.5 yuan per million tokens, yi-34b-chat-200k is priced at 12 yuan per session, and yi-vl-plus is priced at 6 yuan per million tokens.