GPT-4.1 token counter
Type or paste a prompt to count GPT-4.1 tokens and estimate what it costs to run — free, live, and private.
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Counts include each model's own chat-template overhead.
128 charsGPT-4.1
OpenAI · 1M context…tokens
About GPT-4.1 tokenization
- Vendor
- OpenAI
- Context window
- 1M tokens
- Pricing (per 1M tokens)
- $2 input · $8 output (as of 2026-07-07)
- How we count
- the o200k_base encoding, running entirely in your browser
FAQ
How accurate is this GPT-4.1 token count?
Exact — it uses the o200k_base encoding, running entirely in your browser, the same tokenizer the model uses in production.
Does my prompt leave the browser?
No. Tokenization runs entirely in your browser.
What does a GPT-4.1 request cost?
Input tokens × $2/1M plus output tokens × $8/1M (standard tier, as of 2026-07-07). The calculator above does this for your actual prompt.