Tokenization tools
Exact OpenAI counts, Approx cross-model checks, visualizers, and rough words to tokens.
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Tools in Tokenization
- TokenizerExact OpenAI token counts with o200k and cl100k, plus cost for the selected catalog model.
- Tokenizer comparisonPaste once and compare Exact OpenAI encodings vs Approx Claude, Gemini, and host tokenizers. See deltas and example cost.
- Token visualizerSee Exact OpenAI token pieces as colored chips with token IDs. Switch o200k and cl100k encodings.
- Tokens ↔ wordsRough Approx converter between words, characters, and tokens for English budgeting.
Related tools
Tokenizer comparison · Token visualizer · OpenAI tokenizer · Cost calculator
Related guides
Sources and references
Official documentation used for definitions, counting methods, or rate cards. Always confirm critical budgets on the provider page.