GPT Token Calculator
Calculate exact OpenAI BPE tokens and estimate API costs for GPT-4o & Claude.
About GPT Token Calculator
Calculate tokens and API costs accurately before calling LLM APIs. Our GPT Token Calculator uses BPE tokenization rules to display exact token counts, character counts, and cost estimates for GPT-4o, GPT-3.5-Turbo, and Claude 3.5 Sonnet.
Features
- Exact Token Counting: Uses accurate byte-pair encoding tokenization.
- Multi-Model API Cost Estimator: Compares costs across GPT-4o, GPT-4, and Claude 3.5.
- 100% Private Client-Side Parsing: Your text is calculated locally in your browser.
How to Use
- Paste your text or prompt into the text box.
- View real-time token counts and cost estimates per 1,000 requests.
Frequently Asked Questions
What exactly is a Token?
A token is a piece of a word. A helpful rule of thumb is that 1 token is approximately 4 characters of English text.
Is this calculation 100% exact to OpenAI's billing?
No. Our tool uses a highly accurate mathematical approximation to ensure it runs instantly in your browser without massive dictionary files. Your actual billed tokens will be extremely close.
Why are Output costs higher than Input costs?
AI providers structure their pricing this way because generating new text requires significantly more GPU compute power than simply reading text.
How many words is 1 token?
As a rule of thumb, 1 token is roughly 0.75 words (or 4 characters) in English.
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