Count tokens, model compatibility, and estimated costs (howmanytokens.app)

A new online tool has been launched that allows users to analyze text inputs by providing instant estimates of token counts, model compatibility, and estimated costs for 33 different AI models. Users can upload various types of files or paste text directly into the interface, which facilitates quick understanding of how their content performs in terms of tokenization—a crucial factor for processing text in AI applications. This tool is completely free, doesn’t require signup, and processes data directly in the browser, ensuring user privacy. This development is significant for the AI/ML community as it simplifies the complexity of working with different models, particularly for developers and researchers seeking to optimize costs and compatibility. With models like Llama 4 Scout supporting up to 10 million tokens and varying tokenizer vocabularies—such as GPT-4o's 200K vocabulary—users can gain clarity on their text's performance and cost implications. The tool not only aids in efficient model selection but also helps familiarize users with the intricacies of tokenization, which can enhance understanding and application of AI technologies in various projects.