Google Gemini 4 Argon is Google's flagship reasoning model (released October 2026) and the most capable model in the Gemini family. It is built for hard tasks that need deep thinking and multi-step reasoning, and stands out in large-scale software engineering and debugging, expert knowledge work such as legal and finance, cybersecurity defense analysis, scientific research, and long-document understanding, with better instruction following and more direct writing. It accepts text, images, video, audio, and PDF input, supports very long context, and offers a thinking (reasoning) mode with selectable low/medium/high effort (default medium); higher effort reasons more deeply but takes longer to respond. Type your request directly, attach images, PDFs, or documents for the model to read, or enable web search for up-to-date answers. For everyday Q&A, writing, or faster replies, use Gemini 3.8 Flash instead. If you need to search the web for information, please turn on the "Web Search" switch. Maximum context window (input and output combined): about 1,048,576 tokens. Maximum output per reply: about 65,536 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: heic, heif, jpeg, jpg, png, webp. Maximum number of images: 3600. Maximum size per image: 64MB. Maximum total image size per message: 64MB (text and history share the same request size limit; uploads close to the limit may still be rejected). Image dimensions: at least 200 pixels per side. Maximum image resolution: 36,000,000 pixels in total. Output content formats: Text Pricing: High This module supports continuous conversations. AI can make mistakes. Please verify important information.