OPENEUROLLM · RESULTS

Open results,
ready to be used.

Explore the datasets, models, training configurations, evaluation frameworks and research outputs produced by OpenEuroLLM — with direct links to the repositories and resources where they live.

Built in the open for researchers and developers.

Transparent · Multilingual · Reusable
250 TBcatalogued training data27 datasets in September 2026
4.8Tsynthetic tokensacross 36 languages
437model checkpointsconverted and uploaded
>50publicationsacknowledging OpenEuroLLM

Project outputs

Explore all results

26 results

DataPre-training data resources

Training Data Catalogue

A structured catalogue of large-scale pre-training datasets with standardized metadata, language statistics and reproducible ingestion recipes for OpenEuroLLM and the wider EuroHPC ecosystem.

250 TB compressed27 datasetsMirrored on 3 EuroHPC systems
Pre-trainingEuroHPCMetadataOpen resource
DataSynthetic multilingual data

MultiSynt MT-Nemotron-CC

Open multilingual synthetic pre-training data created by translating high-quality English material into OpenEuroLLM target languages.

~4.8T target-language tokens36 languages
Synthetic dataMultilingualPre-training
DataParallel data

Nemotron-CC translated data

Aligned translated data released for selected languages as part of the MultiSynt synthetic-data effort.

Aligned parallel data
TranslationParallel dataMultilingual
DataParallel data

FineWeb-Edu translated data

A second aligned translated dataset published for selected languages as part of OpenEuroLLM's synthetic and multilingual data work.

Aligned parallel data
TranslationFineWeb-EduMultilingual
DataParallel-data pipeline

FineOPUS

A robust pipeline for massively multilingual parallel data derived from OPUS, covering cleaning, normalization, filtering, parallelism checks and quality evaluation, optimized for SLURM-based HPC.

Pipeline + public corpusHPC-ready
Parallel dataData qualitySLURMMultilingual
DataPrivacy tooling

PII masking for OpenEuroLLM

Tooling and masking strategies used to process sensitive information in the first OpenEuroLLM training-data cycle, regex-based, adapted for HPC environments and multilingual scenarios.

HPC-orientedMultilingual PII handling
PrivacyPIIData compliance
DataPrivacy tooling

PII detection

LLM-based PII detection tooling adapted for HPC processing and used for the project's second training-data cycle.

LLM-based detectionHPC-oriented
PrivacyPIIDetection
DataReproducible data packaging

Training Data Collection

A framework that records the exact dataset selection and preprocessing behind each model-training cycle, making the training-data recipe inspectable and reproducible.

9B cycle: ~10T tokens / 56 TB32B cycle: ~19T tokens / 124 TB
ReproducibilityData lineagePre-training
DataDataset quality scoring

Propella-1-4B

A model that annotates text documents across many different categories and languages. Used to filter, select, and curate OpenEuro LLM training data.

Quality annotation model
Data qualityScoringCuration
ModelsReference models

Open-Sci-Ref 0.01

Experimental reference models shared in collaboration with the Open-Sci project and used in OpenEuroLLM evaluation and scaling experiments.

42 model variants evaluated in campaign
Reference modelScalingOpen weights
ModelsReference models

HPLT 2.0 reference models

A public collection of monolingual reference models shared in collaboration with HPLT and used as part of OpenEuroLLM's comparative work.

Monolingual reference models
Reference modelHPLTOpen weights
ModelsModel collection

OpenEuroLLM models

The public OpenEuroLLM model collection, including experimental model and data-mixture releases shared during development.

Public experimental releases
ModelsDatamixOpen weights
ModelsPre-production model

Prelude

OpenEuroLLM's public Prelude model release and intermediate checkpoints, used as a major pre-production run for continuous evaluation and scaling-law validation.

437 checkpoints uploaded project-wide49,407 evals in one Prelude campaign
CheckpointPre-trainingContinuous evaluation
TrainingTokenizer

Tokenizer 256k v2

The public OpenEuroLLM tokenizer released as part of the model and data preparation stack.

256k vocabulary
TokenizerTraining stackMultilingual
TrainingExperiment infrastructure

oellm-autoexp

An open-source framework for large-scale experimentation on EuroHPC systems that generates SLURM scripts, supports nested hyperparameter sweeps and helps monitor training runs.

EuroHPC-readySLURM automation
HPCSLURMExperimentationReproducibility
TrainingLive transparency

OpenEuroLLM training progress

A public-facing space exposing live model-training progress so external communities can follow development as it happens.

Live progress view
TransparencyTrainingDashboard
TrainingLive experiment logs

Baby 9B Dense training logs

Public Weights & Biases workspace used to share training logs and live metrics for the project's Prelude (aka baby) 9B dense training work.

Public training logs
TransparencyWeights & BiasesTraining
TrainingSynthetic-data infrastructure

inference-hive

Essential software identified by the project as part of the production stack behind MultiSynt's synthetic-data rollout.

Synthetic-data generation tooling
InferenceSynthetic dataPipeline
EvaluationEvaluation infrastructure

oellm-eval

A unified framework for reproducible LLM evaluations on EuroHPC clusters, with cluster-aware execution, reproducibility metadata, large job arrays and benchmark suites.

~40 static tasksLUMI · Leonardo · JUPITER · Snellius
EvaluationEuroHPCReproducibilityBenchmarks
EvaluationEvaluation task repository

oellm-tasks

A standalone collection of OpenEuroLLM evaluation tasks that can be consumed by oellm-eval, the Evaluation Harness and other toolkits.

Multilingual + reasoning tasks
BenchmarksTasksEvaluation
EvaluationTask and metric development

eval-framework

An evaluation framework focused on task variants, metrics and multilingual evaluation fidelity, complementing oellm-eval's orchestration layer.

30+ GitHub contributors reported
EvaluationMetricsMultilingual
EvaluationLLM-as-a-judge evaluation

JudgeArena

A unified framework for running multiple LLM-judge benchmarks, including work on tuned open-weight judges, Soft-Elo and calibrated uncertainty.

MT-Bench · AlpacaEval · Arena-Hard · m-Arena-Hard
LLM judgeOpen-weightEvaluation
BenchmarksBenchmark checks

Decontamination benchmarks

A public benchmark collection supporting the project's effort to detect and prevent evaluation data from leaking into pre-training data.

Cross-WP decontamination
DecontaminationEvaluation integrityBenchmarks
BenchmarksTraining-data hygiene

Pretraining decontamination

Public tooling and resources supporting OpenEuroLLM's pre-training decontamination process.

Training / evaluation boundary
DecontaminationPre-trainingEvaluation integrity
ResearchResearch publication

MultiSynt paper

The publication associated with the MultiSynt multilingual synthetic-data work, referenced in the project's technology-rollout section.

Synthetic multilingual data
PaperSynthetic dataMultilingual
ResearchPublication index

OpenEuroLLM publications

The project's public publications index. The first periodic report records 58 publications acknowledging OpenEuroLLM during the reporting period.

>50 publications
PublicationsResearchOpen access

Built openly

OpenEuroLLM is publishing project outputs as they are built. Follow the links above to use the datasets, inspect the code, evaluate the models, reproduce experiments or contribute improvements upstream.

Explore the OpenEuroLLM GitHub