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Release: ttok 0.4

AnnouncementProductOct 8, 2026

The CLI tool ttok, which counts tokens using OpenAI's open-source tiktoken library, received its first update in several years. The release fixes a Click warning, updates CI, and adds a --list-models command listing available models. The tool runs via uvx, allowing token counts with a command like "cat file.txt | uvx ttok". A separate recent post on the site covers Claude Haiku 5.5.

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OpenAICompanyClaude Haiku 5.5Model
Canonical: https://simonwillison.net/2026/Oct/8/ttok/