{"slug": "ttok-0-4", "title": "ttok 0.4", "summary": "Simon Willison released ttok 0.4, an update to his CLI token-counting tool built on OpenAI's open source tiktoken library. The release fixes a Click warning, updates CI, and adds a --list-models command for listing available models, and the tool can be run via uvx, as in `cat file.txt | uvx ttok`.", "body_md": "**Release:** [ttok 0.4](https://github.com/simonw/ttok/releases/tag/0.4)\n\n`ttok` is my CLI tool for counting tokens, using OpenAI's open source [tiktoken](https://github.com/openai/tiktoken) library.\n\nIt 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.\n\nIt works with `uvx`, so you can count tokens in anything like this:\n\n```\ncat file.txt | uvx ttok\n```\n\nTags: [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)", "url": "https://wpnews.pro/news/ttok-0-4", "canonical_source": "https://simonwillison.net/2026/Oct/8/ttok/", "published_at": "2026-10-08 23:34:28+00:00", "updated_at": "2026-10-09 01:18:39.003296+00:00", "lang": "en", "topics": ["ai-tools", "developer-tools", "large-language-models", "generative-ai"], "entities": ["ttok", "Simon Willison", "OpenAI", "tiktoken", "Click", "uvx"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/ttok-0-4", "markdown": "https://wpnews.pro/news/ttok-0-4.md", "text": "https://wpnews.pro/news/ttok-0-4.txt", "jsonld": "https://wpnews.pro/news/ttok-0-4.jsonld"}}