AI Desk · AI FingerprintingWithdrawn *

Qwen: Qwen Plus 0728 (thinking)

qwen/qwen-plus-2025-07-28:thinking · Alibaba (Qwen)Declared and measured agree

Tokenizer lineage (measured): Qwen
Declared tokenizer tag: Qwen3
Entered catalogue: 8 September 2025
Measurement: Variant: inherits its base model’s measurement
Evidence confidence: High

Why high: inherited from qwen/qwen-plus-2025-07-28: a serving variant shares its base model's tokenizer.

Evidence

✓ inherited from qwen/qwen-plus-2025-07-28: a serving variant shares its base model's tokenizer

Compare with Qwen: Qwen Plus 0728

Report a correction

This entry is a serving variant of Qwen: Qwen Plus 0728. A variant shares its base model's tokenizer by construction, so the measurement lives on the base record and this page inherits it.

Identity statement

Qwen: Qwen Plus 0728 (thinking) 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.

What we checked

Four different kinds of evidence, and what each one showed

We checked	What we found	Where it came from
How it counts tokens	Not measured yet	we measured it
How its API is set up	A combination of settings no other listing in the catalogue uses	api_9fac98dc
How much it can read and write	Reads up to 1,000,000 tokens at once, writes up to 32,768	its own listing
Whether it thinks before answering	Reasons when asked to	its own listing

Declared record

What the catalogue claims about this model

Qwen Plus 0728, based on the Qwen3 foundation model, is a 1 million context hybrid reasoning model with a balanced performance, speed, and cost combination.

Modalities: text->text
Declared tokenizer: Qwen3
Prompt price: $0.26 / M tokens
Completion price: $0.78 / M tokens

Supported parameters

frequency_penaltyinclude_reasoninglogprobsmax_tokenspresence_penaltyreasoningresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

defaults: {"temperature":null,"top_p":null,"frequency_penalty":null}

Catalogue entry

History

Every observation, kept as taken

8 September 2025Enters the OpenRouter catalogue declared as Qwen3.

* Qwen: Qwen Plus 0728 (thinking) no longer appears in the OpenRouter catalogue, first absent from the snapshot of 3 September 2026. The record stays because the measurements above were real when they were taken and this address has been published.