Claude Tokenizer

Count tokens for the latest Claude models including Claude Opus 4.8, Sonnet 5, Fable 5 and more. Upload text files, PDFs or images, or paste text directly.

We do not store any files or data. They are discarded immediately after processing.

Text too long for one message? Use our prompt splitter.

Claude Opus 4.8

Heads up: Claude Opus 4.8 uses Anthropic's newer tokenizer, which typically produces more tokens for the same input than Sonnet 4.6 and earlier. For reference we also run the Sonnet 4.6 tokenizer and show both counts.

Claude Tokens

GPT-4o Tokens

Gemini Tokens

Characters

Model

Claude Opus 4.8

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