GPT Token Counter
Estimate OpenAI API token counts for any text. Useful for cost planning and prompt sizing.
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Est. Tokens
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Words
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Characters
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Input Cost
Estimated using a BPE approximation of cl100k_base (GPT-3.5 / GPT-4 / GPT-4o). Each punctuation symbol counts as its own token; common words up to 8 characters are 1 token; longer words are split every ~4 characters. Results are typically within 5–10% of actual tiktoken counts.