Research report 03 / Release momentum

Open Model Momentum

Verified open and disclosed-license model releases, developer activity, and release cadence.

Archived snapshotv3Aug 27, 2026
Open releases
11

33 total model launches

Developers
9

Named release organizations

Most active
Poolside

2 releases

Open share
33%

Disclosed open availability/license

Interactive figureOpen models
CSV JSON
Data status11 verified records across 4 periods

Each dot is a verified monthly observation of verified releases. Lines connect observations in the same series; missing periods are not treated as zero.

Verified observationHover or focus any mark for exact valuesLast updated Aug 27, 2026

Version ledger

Frozen public editions

Each edition preserves the records, method, sources, and downloads available at publication time.

  1. v3 / latestAug 27, 202611 records / 40 sources

    Source-backed fields changed; the frozen snapshot contains 11 records.

  2. v2Aug 27, 202611 records / 40 sources

    Source-backed fields changed; the frozen snapshot contains 11 records.

  3. v1Aug 27, 202611 records / 40 sources

    Initial public snapshot with 11 records and 40 cited sources.

Coverage note

This first edition measures release momentum. Historical download and like growth cannot be inferred before periodic snapshots are collected.

Dataset ID
spd:open-model-momentum
Stable URL
/research/open-model-momentum
Version
v3
Coverage
2026-04/2026-08-26
Records
11
Fields
6
Updated

Read the data

The records behind the figure

CSV JSON
Open Model Momentum data records
DateModelDeveloperRelease typeAvailabilityLicense
2026-04-28Laguna XS.2Poolsideopen weightsPreview; Hugging Face, Poolside API, and OpenRouterApache 2.0
2026-06-09Claude Fable 5AnthropicPublic release (Mythos-class); available via API and EnterprisePublicly accessible via API and Enterprise; included in subscription plans through 2026-06-22 after which access requires purchase of usage credits; some sensitive-topic access restricted and Mythos 5 limited to vetted Project Glasswing participants
2026-07-02Laguna XS 2.1Poolsideopen weightsPoolside API, OpenRouter, Hugging Face weights, and local deploymentOpenMDW-1.1
2026-07-09GPT-5.6 (Sol, Terra, Luna)OpenAIgeneral availabilityGeneral availability following a limited preview
2026-07-31MiniMax H3MiniMaxAPI and open weightsHosted API globally; downloadable weights restricted to the license's applicable territoriesMiniMax H3 Community License Agreement
2026-08-10Muse GlimmerMetaopen weightsConsumer hardware with 24 GB or 32 GB of memoryApache 2.0
2026-08-11Nemotron 3.5 LightningNvidiaopen weights (public release)Available through Nvidia and model repositories including Hugging Face and ModelScope; NeMo Switchyard available on GitHubOpenMDW-1.1
2026-08-18GPT-5.6 SolOpenAIAPILimited release to a small group of customers; wider access planned later
2026-08-24ThomsonThomson Reutersenterprise launch; open-weight version plannedInitially available in CoCounsel Legal’s Tabular Analysis feature; smaller version planned for Hugging FaceNon-commercial license for the planned smaller open-weight version
2026-08-26GLM-5.3-FlashZ.aiopen weights and hosted APIWeights available on Hugging Face; hosted API live; available across GLM Coding Plan tiersMIT
2026-08-26Granite 4.2IBMopen weightsHugging Face, Ollama, GitHub, and other platformsApache 2.0

Measurement technique

How to read this report

  1. 01Open status requires an explicit open, community, or named open license/availability disclosure.
  2. 02Momentum currently measures verified release cadence; download-growth snapshots will be added prospectively rather than reconstructed.
  3. 03A model without disclosed licensing is excluded from the open series.

Sources

Evidence

26 publishers supporting 40 records. Expand a publisher to inspect its cited pages.

openai.comopenai.com5 sources / 5 records
Ars Technicaarstechnica.com3 sources / 3 records
campustechnology.comcampustechnology.com3 sources / 3 records
marktechpost.commarktechpost.com3 sources / 3 records
the-decoder.comthe-decoder.com3 sources / 3 records
siliconangle.comsiliconangle.com2 sources / 2 records
Show 20 more publishers
x.aix.ai2 sources / 2 records
anthropic.comanthropic.com1 source / 1 record
artificialintelligencemadesimple.comartificialintelligencemadesimple.com1 source / 1 record
autoclaw.z.aiautoclaw.z.ai1 source / 1 record
blog.googleblog.google1 source / 1 record
CNBCcnbc.com1 source / 1 record
cryptobriefing.comcryptobriefing.com1 source / 1 record
deccanherald.comdeccanherald.com1 source / 1 record
economictimes.comeconomictimes.com1 source / 1 record
finance.yahoo.comfinance.yahoo.com1 source / 1 record
invezz.cominvezz.com1 source / 1 record
justsecurity.orgjustsecurity.org1 source / 1 record
readthepeak.comreadthepeak.com1 source / 1 record
semafor.comsemafor.com1 source / 1 record
stocktitan.netstocktitan.net1 source / 1 record
TechCrunchtechcrunch.com1 source / 1 record
technologyreview.comtechnologyreview.com1 source / 1 record
thelogic.cothelogic.co1 source / 1 record
vir.com.vnvir.com.vn1 source / 1 record
yahoo.comyahoo.com1 source / 1 record
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