Prompt Token Counter

Prompt Token Counter is a straightforward web tool that helps developers and AI practitioners count tokens in their prompts for OpenAI models. You simply paste your text into the interface, and it instantly calculates how many tokens your prompt contains across various OpenAI model variants. This is essential because OpenAI models have strict token limits, and exceeding them can cause API requests to fail or incur unexpected costs.

The tool works by simulating the tokenization process used by OpenAI's models, though it doesn't use the actual OpenAI API. It supports multiple model families including GPT-4o, GPT-4, and various specialized variants. Your prompts are never stored or transmitted through the internet, ensuring complete privacy for your sensitive AI prompts and proprietary information.

This tool is most valuable for developers working with OpenAI's API, prompt engineers optimizing their queries, and anyone who needs to manage their token usage effectively. It's particularly useful for checking lengthy prompts before sending them to the API, ensuring you stay within model limits and avoid failed requests. For those needing more advanced optimization, the site also offers a professional prompt optimization service with expert consultation.