Why high: an exact fingerprint shared with 40 models that declare the same family, without a second signal of a different kind yet.
Qwen: Qwen3 Coder Flash is Alibaba (Qwen)'s model. Its measured tokenizer sits with the Qwen group, which is evidence that it builds on the Qwen tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against Alibaba (Qwen)'s authorship of the model itself.
| We checked | What we found | Where it came from |
|---|---|---|
| How it counts tokens | Counts every one of the 50 test strings exactly like 40 other models | tk_5410b38e |
| How its API is set up | A combination of settings no other listing in the catalogue uses | api_492f9ec6 |
| How much it can read and write | Reads up to 1,000,000 tokens at once, writes up to 65,536 | its own listing |
| Who served our requests | Alibaba | we measured it, 21 August 2026 |
Click a row to open the full comparison.
We sent Qwen: Qwen3 Coder Flash fifty short pieces of text and recorded what each one cost it in tokens. The bars below are those costs. Two models built on the same tokenizer produce the same bars; a model built on a different one produces a different set, which is what makes this a fingerprint.
Overhead subtracted: 8 prompt tokens.
Qwen3 Coder Flash is Alibaba's fast and cost efficient version of their proprietary Qwen3 Coder Plus. It is a powerful coding agent model specializing in autonomous programming via tool calling...
Supported parameters
frequency_penaltylogprobsmax_tokenspresence_penaltyresponse_formatseedstoptemperaturetool_choicetoolstop_ktop_logprobstop_p
defaults: {"temperature":null,"top_p":null,"frequency_penalty":null}
