Release: ttok 1.0
I released ttok 0.4, ran uv tool upgrade ttok, piped a file into the new version… and realized that it was defaulting to the GPT-4 tokenizer when it should very clearly default to GPT-5/GPT-6 instead!
I figured switching the default was a reasonable excuse to finally ship a 1.0.
OpenAI haven’t actually confirmed that GPT-6 uses the same tokenizer as the GPT-5 family yet – there’s an angry issue about it – but I found this commit by William Liu which reports on an experiment he ran confirming that the tokenizers are likely the same:
All seven GPT models (5.5, 5.6 Sol/Terra/Luna, 6 Astra/Sol/Luna) report 44,794 tokens and match each other on every one of the 31 fixtures. GPT-6 introduces no input-count change on this corpus.
Tags: projects, ai, openai, generative-ai, llms, tokenization
