# get_num_tokens

> **Function** in `langchain_community`

📖 [View in docs](https://reference.langchain.com/python/langchain-community/callbacks/infino_callback/get_num_tokens)

Calculate num tokens for OpenAI with tiktoken package.

## Signature

```python
get_num_tokens(
    string: str,
    openai_model_name: str,
) -> int
```

## Description

**https://github.com/openai/openai-cookbook/blob/main:**

/examples/How_to_count_tokens_with_tiktoken.ipynb

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[View source on GitHub](https://github.com/langchain-ai/langchain-community/blob/7c10a5fa327f6aaaf7c932822a9e5d144891406e/libs/community/langchain_community/callbacks/infino_callback.py#L21)