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Model Passport / Mistral / Devstral 2

Devstral 2 123B

Weights are downloadable, and the licence is not one the OSI approves: the card calls it a "Modified MIT License" of the creator’s own drafting, so no SPDX identifier is recorded and the OSI claim is false while the downloadable claim is true. Released the same day as the 24B model, which carries Apache 2.0 instead, so one announcement covers two models under two different licences. Text is the only input recorded: this card lists no vision capability, while the 24B card published beside it does, so the difference is what each card states rather than an omission here.

AvailableChecked Sep 7, 2026
01
Identity

What it is

Weights are downloadable, and the licence is not one the OSI approves: the card calls it a "Modified MIT License" of the creator’s own drafting, so no SPDX identifier is recorded and the OSI claim is false while the downloadable claim is true. Released the same day as the 24B model, which carries Apache 2.0 instead, so one announcement covers two models under two different licences. Text is the only input recorded: this card lists no vision capability, while the 24B card published beside it does, so the difference is what each card states rather than an omission here.

When to use it. Agentic software engineering: exploring codebases, editing multiple files, and driving software engineering agents.

Model DNA

9 identity dimensions, each read from a single field of this release's record and shown in the same order on every model. Nothing here is a score, a rating, or a ranking, and a dimension the record does not carry says so rather than being left out.

  • CreatorMistral
  • FamilyDevstral 2
  • Generation2
  • Tier123B
  • InputText
  • OutputText
  • SpecializationCoding, Language and reasoning
  • AccessOpen-weight
  • WeightsDownloadable
What each segment means, and which field it comes from
Creator
MistralThe organization recorded as having built this release. A creator is not the same entity as a platform that serves the model or a product that ships it.Read from organizationId on this release record.How ModelTree keeps creator, model, product and platform separate
Family
Devstral 2The model line this release belongs to, as its creator names it. A family groups releases; it is not itself a release.Read from familyId on this release record.How ModelTree keeps creator, model, product and platform separate
Generation
2The version string the creator published for this release, recorded as written. ModelTree does not renumber, normalise, or order versions.Read from version on this release record.
Tier
123BThe variant name the creator gave this release within its family. It is a name, not a rank: what a creator means by it is recorded only where the creator has stated it.Read from variant on this release record.Why ModelTree publishes no universal ranking
Input
TextThe kinds of input this release is documented as accepting.Read from inputModalities on this release record.
Output
TextThe kinds of output this release is documented as producing.Read from outputModalities on this release record.
Specialization
Coding, Language and reasoningThe documented focus of this release. Categories are labels, never summed or weighted into a score.Read from categories on this release record.
Access
Open-weightHow this release can be reached, as its creator documents it.Read from accessType on this release record.How ModelTree defines each access type
Weights
DownloadableWhether the licence record held for this release documents its weights as downloadable. Downloadable weights and an OSI-approved licence are separate claims, so this is not a statement that the release is open source.Read from license on this release record.What “open weight” means
Creator
Mistral
Family
Devstral 2
Version
2
Variant
123B
Released
Dec 9, 2025
Lifecycle status
Available
Access
Open-weight
Record slug
devstral-2-123b-instruct

Canonical record

Canonical name
Devstral 2 123B Instruct 2512
Canonical page
/ModelTree/models/devstral-2-123b-instruct/
Lifecycle
Available. The vendor’s currently offered version. Shown as “Available”. It is not a claim that the model is recommended or preferred — only that the vendor still offers it.

Also known as

  • Devstral 2 123B Instruct 2512

No API identifier is recorded for this release.

02
Lineage

Where it fits

MistralDevstral 2Devstral 2 123B

Sibling variants

Releases published as variants of the same family. It implies no ordering between them.

What the tier names mean

No creator statement of what these 2 variant names mean is recorded for Devstral 2.

Tier names are recorded for one family and generation at a time, because the same word can mean different things in two generations of the same line. Entries are ordered by first release, which is not a ranking, and ModelTree draws no comparison between this family's names and any other creator's. How ModelTree treats guidance and ranking

Mistral has published no statement ModelTree could verify about what these names mean: 123B, 24B. ModelTree does not infer a tier's meaning from its name, its price, or where it sits in a list.

03
Technical record

Documented limits

Input modalities
text
Output modalities
text
Context window
256,000 tokens
Maximum output
Not recorded
Parameters
123B total
Categories
  • Coding
  • Language and reasoning
04
Access and licensing

How you can get it

Open-weight. Model weights can be downloaded. This alone says nothing about the licence: the schema records downloadable weights and OSI-approval as two separate booleans, so open-weight does not imply open-source.

How ModelTree defines access and licensing

Licence

Licence
Modified MIT License
SPDX identifier
Not recorded
Downloadable weights
Weights are documented as downloadable.
OSI-approved
The licence is not recorded as OSI-approved, so this release is not described as open source.
Coverage

What this passport does not record

These sections are absent from this page because no reviewed record exists for them. They are listed rather than dropped silently, because a missing section and a section ModelTree has decided nothing about look identical otherwise.

Where it is served
No deployment record ties this release to a serving platform. ModelTree has not yet reviewed platform availability for this record; absence is not a claim that the model is unavailable.
What it costs
No published price is recorded for this release. A price is held only against a reviewed deployment on a named platform, with its currency, unit, and effective date; absence is not a claim that the model is free or unpriced.
What has changed
No dated release event is recorded for this release beyond its release date. Announcement, availability, and deprecation events are held as separate sourced records, and none has been reviewed for this one.
05
Usage evidence

Who reports using it

No source-qualified usage evidence is recorded for Devstral 2 123B.

ModelTree records a usage figure only when a citable source states the metric, the population it measured, the time window, and the method behind it. Absence here means no qualifying observation has been verified, not that the model is unused.

How ModelTree qualifies usage evidence

Incompatible populations are never merged

Weekly users of one assistant, downloads from one model hub, and routed tokens on one aggregator count different populations. ModelTree groups observations only when the metric, the unit, and the measured population match exactly. Nothing is converted, normalized, weighted, or ranked, and there is no composite popularity score.

Sources are qualified, not scored

Every observation names the exact sources behind it and states whether it is a creator self-report, a platform operator report, an independent measurement, a developer survey, or a community signal. Creator self-reports are kept in their own labelled list because the creator has an interest in the figure; they are still shown, never hidden.

A synthesis needs two independent publishers

A cross-source statement may only be made when at least two non-creator observations from at least two different publishers measure the same metric over the same population. A single-source observation is still published as an observation, but it cannot produce a cross-source statement.

Missing and conflicting evidence stays visible

When no qualifying source exists, this section says so rather than estimating. When two qualifying sources disagree, both readings are shown and labelled as conflicting; neither is dropped and no winner is declared. A figure that has not been re-checked within 180 days is marked stale.

06
Conditional fit

When it fits, and when it does not

Everything in this section is ModelTree editorial synthesis: a reading of facts recorded elsewhere in this dataset, each traced to the sources beneath it. It is conditional guidance for a stated situation. It does not declare this model preferable to another, and no overall verdict is produced here or anywhere else in ModelTree.

No conditional-fit guidance is recorded for Devstral 2 123B.

A statement is published only when it can be derived from specific recorded facts about this release and cite the sources those facts already carry. Absence here means no such statement has been verified, not that the model suits every situation or none.

How ModelTree derives conditional fit

Guidance is conditional, never a verdict

Every statement is filed as one of three kinds — good fit when, trade-off, or avoid when — and each carries the condition it applies under. There is no fourth, unconditional kind, no composite score, and no comparison against other models.

What the wording check does, and what it cannot do

Validation refuses a fixed list of vocabulary in ModelTree’s own editorial text: superlatives, best-in-class and go-to framing, beats-everything phrasing, numeric rankings, universal quantifiers, and composite-score wording. That is a vocabulary filter, not a judgement about meaning. It catches the usual ways a verdict gets written down, but a comparative claim phrased around those words would pass it, and it errs toward rejecting borderline wording that an author can simply rephrase. The check that actually holds is provenance, below: a statement may cite only the sources the facts beneath it already cite, so a comparison cannot pull in a source no recorded fact carries. That constrains where evidence comes from, not what a sentence means. Neither check reads a statement and decides whether its facts support it — that judgement stays with you, which is why every statement lists the facts and sources it rests on.

The rubric is disclosed, not weighted

A statement names the dimensions it was derived from, and each dimension must be answered by a fact of a kind that can answer it. Dimensions are never added up or weighed against each other; they exist so a reader can see which questions were asked.

  • Context windowHow much input and output length does the documentation state?
  • Documented limitsWhat limits and intended uses does the documentation state outright?
  • Modality coverageWhich inputs and outputs are documented?
  • Access and licensingHow can it be obtained, and what does its licence permit?
  • Lifecycle stabilityWhat lifecycle stage do the vendor records place it in?
  • Cost structureWhat rates are recorded, in which unit and currency?
  • Measured benchmark evidenceWhat did a recorded evaluation measure, under which setup?
  • Usage evidenceWhat source-qualified usage has been observed, over which population?

The evidence threshold

A statement must rest on at least one structured fact already recorded here — a release or family field, a lifecycle event, an evaluation result, a usage observation, or a pricing record — and it must be a fact about this release. It may cite only sources those facts already cite, so guidance cannot pull in a source no recorded fact carries, and it cannot be dated earlier than the evidence beneath it.

Conflicts are shown, not resolved

When two statements about this release contradict each other on the same dimension, both are published and linked to one another. ModelTree does not decide between them, and the underlying disagreement between sources is left visible.

What this cannot tell you

Recorded facts are mostly documentation, and documentation states what an interface accepts rather than how well a model behaves. Where a dimension has no qualifying evidence, it is listed as a gap instead of being filled by inference. The date shown on a statement is the verification date of the newest fact beneath it, not a record that an editor re-read the reasoning; once that evidence is more than 180 days old the statement is marked stale. Nothing here is a recommendation tailored to a reader, and nothing here ranks models.

07
Provenance

Primary sources

Found something wrong on this page?Report incorrect data for devstral-2-123b-instruct. Corrections are filed against the record slug so the fix lands on the right release.

Every fact above is recorded with the primary source it came from and the date it was last checked. This record was last verified on.How we verify and keep facts fresh.