xAI Grok 4.5 is the 2026 flagship Grok model with a 500K-token context window (split longer content into parts). Stronger reasoning and general chat; use the reasoning-effort dropdown (low/medium/high, default high) and the thinking-display option to tune how deeply it thinks. Web search and image/document upload are supported. If you need to search the web for information, please turn on the "Web Search" switch. Maximum context window (input and output combined): about 500,000 tokens. 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: jpeg, jpg, png. Maximum size per image: 20MB. Image dimensions: at least 200 pixels per side. Maximum image resolution: 36,000,000 pixels in total. Output content formats: Text This module supports continuous conversations. AI can make mistakes. Please verify important information.