Arvin AI is an all-in-one AI assistant powered by GPT-4o, Gemini 1.5, and Flux. It offers a range of tools including an AI resume and cover letter writer, AI writing tools for marketing emails and blog articles, product listings, and job application materials. It also provides AI art generation, summaries, and content creation through a Chrome extension. Arvin AI includes features for AI chat, search, data analysis, and various writing, image, and reading tools.