PromptSpend

PromptSpend provides a dynamic cost estimation for language models, ensuring pricing accuracy by re-checking vendor catalogs daily. Key features include: • Daily price catalog updates from vendor pages • Flags disagreements in pricing instead of averaging • Shows source URL and confirmation date for all data • Compares up to four models side-by-side • Accounts for compounding chat history and hidden reasoning tokens This platform offers a crucial advantage over static calculators by continually validating its pricing data, providing transparency with direct source links. Users can paste actual prompts or set a scale to instantly visualize monthly expenditures across a wide range of models. It's designed to expose the often-overlooked costs of chat history accumulation and the processing of hidden tokens, giving a truly comprehensive financial forecast. Ideal for developers, product managers, and engineering teams evaluating the financial implications of integrating large language models into their applications. PromptSpend helps in budgeting and strategic planning before development begins, ensuring cost clarity. It's free, requires no account, and is entirely open source, offering full transparency and community accessibility.