AI Token Counter
Paste your text to count tokens and see estimated costs across popular AI models — all calculations run in your browser.
| Model | Input Cost | Output Cost |
|---|
How to use AI Token Counter
- Paste or type your text into the input area.
- View the estimated token count and character count.
- See cost estimates for each model listed below.
What is AI Token Counter?
Token counting is essential for managing AI API costs. This tool estimates token counts using a heuristic tokenizer and instantly shows what your text would cost to process across GPT-4o, Claude Sonnet, Gemini Pro, and more.
Understanding token counts helps you optimize prompts, stay within context windows, and budget API spend accurately.
FAQ
- Is this an exact token count?
- It's a close estimate based on common tokenization patterns. For exact counts, use the provider's tokenizer.
- Does it support different tokenizers?
- This uses a general-purpose heuristic. Different models tokenize text slightly differently.
Related tools
People also use
- AI Context Window Planner🧮 Calculators & Converters
Plan your AI context window usage. Allocate token budgets between system prompts, conversation history, documents, and model output.
- AI Image Token Calculator🧮 Calculators & Converters
Estimate token costs for AI vision APIs. Calculate how many tokens images consume in GPT-4o, Claude, and Gemini vision models.
- AI Prompt Token Estimator🧮 Calculators & Converters
Break down your AI prompt into components and estimate tokens for each part. See system prompt, user message, and context token counts separately.