AIHub is an all-in-one AI platform that provides access to 19 different language models from eight vendors, including OpenAI, Anthropic, Google, Meta, Mistral, Perplexity, DeepSeek, and xAI, all under a single monthly subscription. The platform allows users to interact with models such as GPT, Claude, and Gemini within one chat interface. Each model is billed in credits based on its real usage cost, with a short message of 1,000 input tokens and 500 output tokens costing a specific number of credits depending on the model selected. Plans start at 19 dollars per month, and users can also purchase top-up credits starting at 5 dollars for 3,000 credits, which never expire. The account itself is free, but a plan or top-up is required before sending the first message. Key features include the ability to compare answers from two different models side by side by selecting a second model from a chip above the message box. Users can save prompts into a library that persists across model selections, allowing them to reuse effective prompts without re-entering them. The platform displays a running credit meter on screen so users can track their usage in real time. A full price list is provided, showing the credit cost per short message for each model, enabling users to choose the most cost-effective option for their query. Typical use cases include evaluating which AI model performs best for a specific task by sending the same prompt to multiple models and comparing the responses. Users can also build and maintain a library of prompts that work consistently across different models, streamlining repetitive workflows. The platform is suited for individuals or small businesses that need access to multiple AI models without managing separate subscriptions, as well as for developers and researchers who want to test model outputs or benchmark performance. Technical requirements are minimal; the service is accessed through a web browser at aihub.group, and users log in to an existing account or sign up for a new one. The platform also offers supplementary resources such as a prompt library guide, AI model API pricing data, and articles comparing specific models and subscription plans.