How Qwen tokenization works
Qwen uses a published BPE tokenizer with a roughly 150K-entry vocabulary tuned for strong Chinese and multilingual coverage. This page runs that tokenizer in your browser, so Qwen3-family counts are exact.
CJK text tokenizes heavier than English: expect roughly 1 token per 1–2 Chinese characters versus 1 per 4 English characters. This estimator adjusts automatically when it detects CJK text.
Qwen3.5 Plus supports a 1-million-token context window; Qwen3 Max supports 252,000 tokens.