Count tokens for OpenAI's GPT, Anthropic's Claude and other AI models. Calculate API costs, optimize token usage, and compare models with our free AI token counter tool.
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Tokens are the basic units that AI models use to process text. They can be words, parts of words, or even individual characters. Most models use subword tokenization where common words become single tokens, while uncommon words may be split into multiple tokens.
Each AI model uses its own tokenization method. For example, 'hello' is typically 1 token, while 'uncommon' might be 2-3 tokens depending on the model's vocabulary.
Yes. Different models use different tokenization algorithms. GPT models use BPE (Byte Pair Encoding), while Claude and others have their own approaches.
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