Qwen: Qwen Plus 0728 (thinking)

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

Tokenizer lineage (measured): Qwen
Evidence confidence: High
Declared tokenizer tag: Qwen3
Entered catalogue: 8 September 2025
Last tested: Not yet measured
Measurement: Variant: inherits its base model’s measurement

Evidence

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

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.

Evidence stack

Signals of different kinds, weighed together

Signal	Result	Reference
Tokenizer signature	Not measured	–
API surface	No other entry shares this exact contract	api_9fac98dc
Context and output	1,000,000 context · 32,768 max output	declared
Reasoning contract	Optional	declared
Serving providers observed	None recorded yet	–

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.

Cite this page as the evidence record for Qwen: Qwen Plus 0728 (thinking): the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings. The raw data behind every figure is on the data page.