MoonshotAI Kimi K3 is a flagship model that combines strong reasoning with image understanding and a context window of up to 1M tokens. Accessed via OpenRouter. Type a task into the box below, or upload images for description, analysis, and comparison, and PDF or Office documents for long-form reading and summarization. Well suited for long-document analysis, cross-document comparison, chart and screenshot interpretation, multi-step reasoning, and research tasks that need large context. Use the reasoning-effort dropdown to tune thinking depth; pick high or xhigh for hard problems. For everyday chat, Seed or the local models cost less; for long-horizon coding workflows, consider GLM 5.2. Maximum context window (input and output combined): about 1,048,576 tokens. Maximum output per reply: about 65,500 tokens (model reasoning, if any, counts toward this limit). Maximum total upload size per request: 256MB (all files and message content combined). Accepted document formats: pdf, docx, xlsx, pptx, txt, csv (file content is provided to the model as extracted text). Accepted image formats: bmp, gif, jpeg, jpg, png, webp. Maximum size per image: 10MB. Image dimensions: at least 11 pixels per side. Maximum image resolution: 36,000,000 pixels in total. Image aspect ratio: 1/200 to 200. Output content formats: Text This module does not support continuous conversations. AI can make mistakes. Please verify important information.