# ttok 0.4

> Source: <https://simonwillison.net/2026/Oct/8/ttok/>
> Published: 2026-10-08 23:34:28+00:00

**Release:** [ttok 0.4](https://github.com/simonw/ttok/releases/tag/0.4)

`ttok` is my CLI tool for counting tokens, using OpenAI's open source [tiktoken](https://github.com/openai/tiktoken) library.

It hasn't been in updated in a couple of years, but I finally fixed a Click warning, updated CI, and added a `--list-models` command to list available models.

It works with `uvx`, so you can count tokens in anything like this:

```
cat file.txt | uvx ttok
```

Tags: [projects](https://simonwillison.net/tags/projects), [ai](https://simonwillison.net/tags/ai), [openai](https://simonwillison.net/tags/openai), [generative-ai](https://simonwillison.net/tags/generative-ai), [llms](https://simonwillison.net/tags/llms), [tokenization](https://simonwillison.net/tags/tokenization)