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Mistral: Mistral Medium 3.1 (batch)

mistralai/mistral-medium-3.1:batch · Mistral AIDeclared and measured agree

Tokenizer lineage (measured): Mistral
Evidence confidence: Very high
Declared tokenizer tag: Mistral
Entered catalogue: 13 August 2025
Last tested: Not yet measured
Measurement: Awaiting measurement

Evidence

✓ inherited from mistralai/mistral-medium-3.1: a serving variant shares its base model's tokenizer

Compare with Mistral: Mistral Medium 3.1

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This entry is a serving variant of Mistral: Mistral Medium 3.1. 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

Mistral: Mistral Medium 3.1 (batch) is Mistral AI's model. Its measured tokenizer sits with the Mistral group, which is evidence that it builds on the Mistral tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against Mistral AI's authorship of the model itself.

Evidence stack

Signals of different kinds, weighed together

Signal	Result	Reference
Tokenizer signature	Not measured	–
API surface	Identical contract to 3 other entries	api_f2644e32
Context and output	131,072 context · 104,857 max output	declared
Reasoning contract	None declared	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

Mistral Medium 3.1 is an updated version of Mistral Medium 3, which is a high-performance enterprise-grade language model designed to deliver frontier-level capabilities at significantly reduced operational cost. It balances...

Modalities: text+image+file->text
Declared tokenizer: Mistral
Prompt price: $0.20 / M tokens
Completion price: $1.00 / M tokens

Supported parameters

frequency_penaltymax_tokenspresence_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_p

defaults: {"temperature":0.3}

Catalogue entry

History

Every observation, kept as taken

13 August 2025Enters the OpenRouter catalogue declared as Mistral.

Cite this page as the evidence record for Mistral: Mistral Medium 3.1 (batch): the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.