GPT Token Calculator
Free GPT token calculator — count tokens and estimate OpenAI API cost for GPT-5.6 Sol/Terra/Luna, GPT-5.5, GPT-5.4, GPT-5, GPT-4o and GPT-3.5 in seconds. Runs 100% in your browser.
GPT Token Calculator is a free online ai tool from FastDailyTools (Estimate GPT tokens and API cost instantly.). Free GPT token calculator — count tokens and estimate OpenAI API cost for GPT-5.6 Sol/Terra/Luna, GPT-5.5, GPT-5.4, GPT-5, GPT-4o and GPT-3.5 in seconds. Runs 100% in your browser. It runs entirely in your browser — no sign-up, no account, no email and no upload — and every result can be exported as a dated PDF report.
- ✔ Price: free, unlimited use, no rate limits
- ✔ Sign-up: not required
- ✔ Privacy: all math runs client-side, nothing is uploaded
- ✔ Export: one-click PDF report (2026 rates)
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How to use GPT Token Calculator
- Paste your prompt in the input.
- Select the GPT model (GPT-5.6, GPT-5.5, GPT-5.4, GPT-5, GPT-4o, GPT-4 Turbo, or GPT-3.5).
- See the token count and estimated USD cost update instantly.
- Copy the result or adjust the prompt.
Frequently asked questions
What is a GPT token?
A token is a chunk of text (roughly 4 characters or ¾ of a word in English) that GPT models process. OpenAI prices are billed per 1K tokens.
Which GPT models are supported?
GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna, GPT-5.5, GPT-5.4 (and mini/nano), GPT-5.2, GPT-5 (and mini/nano), GPT-4o, GPT-4o mini, GPT-4 Turbo, and GPT-3.5 Turbo.
How accurate is this GPT token calculator?
It uses a proven chars/4 approximation which is within ~5% of OpenAI's official tiktoken library for English text.
Does it send my prompt to OpenAI?
No. All calculation runs locally in your browser — your text never leaves your device.
How much does 1000 tokens cost with GPT-5.5?
GPT-5.5 is roughly $0.008 per 1K input tokens and $0.032 per 1K output tokens. Confirm the latest with OpenAI.
How can I reduce my OpenAI API cost?
Shorten prompts, use smaller models (GPT-5.4 mini/nano, GPT-4o mini) for simple tasks, cache system prompts, and set max_tokens on responses.
Is this token counter free?
Yes — 100% free forever, no sign-up, no rate limit.