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; the default is max, and low or high gives faster answers for simpler questions. For everyday chat, Seed or the local models cost less; for long-horizon coding workflows, consider GLM 5.2. Prompt example 1: (Upload two contracts, PDF) Compare them clause by clause on warranty scope, liability for breach and termination terms, in a side-by-side table. Prompt example 2: (Upload a monthly operations dashboard screenshot, png) Interpret the changes in each metric, identify the two most notable issues and infer likely causes. Prompt example 3: Research how an aging society affects urban transport planning: key issues by area, common international approaches and feasible policy recommendations. Prompt example 4: (Upload two versions of a web page design, png) Compare their visual hierarchy, readability and mobile fit, and recommend which one to use. Prompt example 5: A project has five tasks: A takes 3 days; B 2 days after A; C 4 days after A; D 2 days after both B and C; E 1 day after D. Find the shortest total duration and the critical path. Prompt example 6: (Upload three photos of a machine part from different angles, jpg) Work out what the part is likely used for, where it is worn, and suggest repair steps. Prompt example 7: Reason through how adopting daylight saving time in Taiwan might affect electricity use, road safety and daily routines, explain each step and list the data needed to verify it. Prompt example 8: (Upload two aerial photos of the same hillside taken five years apart, jpg) Compare the changes in vegetation and terrain, infer likely causes and assess the risk of a landslide. Prompt example 9: (Upload a circuit diagram, png) Explain what the circuit does, work out the voltage and current across each resistor step by step, and point out any likely design errors. Prompt example 10: Are these two statements contradictory? Reason step by step: A says everyone who passed the exam took the prep course; B says someone passed without taking it. 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: 512MB (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 Pricing: Medium-high Continuous conversation: Not supported AI can make mistakes. Please verify important information.