LLMfamily
Apertus v1.5
Swiss AI's fully open models (open weights, open data, full training recipes), Apache 2.0 plus an Acceptable Use Policy.
Levelfamily
ClassLLM
Parametersnot in the notes
Contextnot in the notes
Releasednot in the notes
Opennessfully open
Runs onnot in the notes
Statusactive
Benchmark Results
maintainer-run
SEA-HELMSoutheast Asian and Indonesian
Apertus v1.5 70Bmaintainer-run
64.69 95% CI [-1.37, +1.36]
SEA-HELM Indonesian, open-weight models, average of 2,000 bootstraps
Apertus v1.5 8BCheckpoint Apertus-v1.5-8B as listed; release view (data last updated 18 Sep 2026); score is the average of 2000 bootstrapsmaintainer-run
62.23 95% CI [-1.32, +1.32]
SEA-HELM leaderboard, 58 models, Indonesian (ID)
Apertus v1.5 8BCheckpoint Apertus-v1.5-8B as listed; release view (data last updated 18 Sep 2026); score is the average of 2000 bootstrapsmaintainer-run
54.16 95% CI [-0.62, +0.62]
04080
Score in score. Higher is better.
SEA-HELM leaderboard, 58 models, SEA average
Where this comes from
Every score names who ran it: vendor-reported, maintainer-run or independent. A rank is shown with the population it was ranked in (gap rule 3).
Lineage
Apertus v1.5 70B belongs to this familymultimodal LLMSep 202670BApertus v1.5 8B belongs to this familymultimodal LLM24 Jul 20268BWhere this comes from
Parent and child relations from model cards, Hugging Face base_model fields and the genealogy tables of the research notes. Confidence and evidence are the notes' own.
R&D Topics
Identity
- Developer
- Swiss AI (EPFL, ETH Zurich, CSCS)
- Family
- not in the notes
- Released
- – sources
- Weights published
- –
- Record checked
- 10 Oct 2026
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.
Architecture and Size
- Architecture
- dense transformer
- Total parameters
- – sources
- Active parameters
- –
- Checkpoint parameters
- –
- Context length
- not in the notes
- Input
- text
- Output
- text
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).
Openness and Access
- Openness
- fully open
- Licence
- Apache License 2.0 sources
- Access routes
- open weights download
Where this comes from
The licence file governs over registry tags and aggregator labels.
Deployment
- Runs on
- not in the notes
- Footprint
- not in the notes
- Runtimes
- not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.
Indonesia
- Indonesian support
- not stated
- Regional languages
- not in the notes
- Jakarta hosting
- unknown
- Languages
- not in the notes
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.
Industry Use Cases
No industry use case links this model.
Links
ModelApertus v1.5Swiss AI (EPFL, ETH Zurich, CSCS), LLM
Apertus v1.5Swiss AI (EPFL, ETH Zurich, CSCS), LLMR&D TopicsOpen-Weight Frontier Releases as Research SubstrateRegional or National Foundation Model Training (Continued Pretraining at 7B to 70B)
Use CasesIndonesian and Regional-Language LLMsPublic SectorBanking Customer Service AssistantsFinanceCitizen Service AssistantsPublic SectorClinical LLM (Open Weights)Healthcare+3 moreUse cases of models in the same R&D topic; none is recorded for this model itself.
Who Runs It
PT Amman Mineral Nusa Tenggara (AMMAN)In production, 8 Jul 2026
PT PegadaianIn production, 5 Jun 2026
Bank Central Asia (BCA)In production, 16 Mar 2026Bank Central Asia (BCA)In production, 16 Mar 2026+14 moreDeployments of these use cases; none names this model.
PT Amman Mineral Nusa Tenggara (AMMAN)In production, 8 Jul 2026PT PegadaianIn production, 5 Jun 2026Bank Central Asia (BCA)In production, 16 Mar 2026Bank Central Asia (BCA)In production, 16 Mar 2026+14 moreDeployments of these use cases; none names this model.Models 2
R&D topics 2
Open-Weight Frontier Releases as Research SubstrateUsing released weights as the base for downstream research.used byRegional or National Foundation Model Training (Continued Pretraining at 7B to 70B)Pretraining or continued pretraining a mid-size model to serve a national or regional lan…produced by
Sources
- huggingface.co/swiss-ai https://huggingface.co/swiss-ai
- huggingface.co/swiss-ai/Apertus-v1.5-70B https://huggingface.co/swiss-ai/Apertus-v1.5-70B
To cite this page: Project AURION, AI Use-Cases Research & Innovation, "Apertus v1.5", https://aurion.semai.id/models/swiss-ai-apertus-v1-5/, records of October 2026.