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Partners & Ecosystem

Nvidia
Mozilla
AI Alliance
Wikimedia Foundation
thws
Scaleway
Nvidia
Mozilla
AI Alliance
Wikimedia Foundation
thws
Scaleway
Nvidia
Mozilla
AI Alliance
Wikimedia Foundation
thws
Scaleway

Our Products

Synth

Synthetic Data for AI agents

We simulate expert-level reasoning and domain-specific processes to generate training data that builds true specialization into your models. Synth handles the cold start problem, covers the long tail of edge cases through engineered simulations, and runs entirely on-premise to keep sensitive data under your control.

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Common Corpus

Fully Open Data for AI

We curate and structure the world's largest rights-cleared and provenance-based dataset for LLMs - government records, legal archives, scientific literature, multilingual sources - so you can plug it directly into your models, RAG pipelines, and MCP servers.

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Stratum

AI-Native Tooling for Agents

Turn your messy siloed documents into a single, structured, compliant data asset for your agentic AI workflows. Your AI systems and agents get not only the right information but rich trustworthy context - higher accuracy on a wider range of processes. A built-in privacy firewall handles PII before anything leaves the secure zone. Deployable fully on-premise.

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Recent Blogs

An RLM agent for searching Wikidata, and the traces to train on itBlog

An RLM agent for searching Wikidata, and the traces to train on it

In partnership with AI-BRIDGES at the Digital Humanities Research Hub, University of London, we are releasing an open recursive harness in which language models search Wikidata through code, instead of pasting graph results into their context. In it, Qwen3.8-27B, an open-weight model served on a single GPU, answers 74 of 100 test questions, the best score in our evaluation, and gpt-6-luna doubles its accuracy on multi-hop questions. Alongside it, we release the 10,235 search traces recorded in the harness, for training smaller models to do the same.

Carlos RosasMohamed ChenenePierre-Carl LanglaisAnastasia Stasenko
Carlos Rosas, Mohamed Chenene, Pierre-Carl Langlais & Anastasia Stasenko
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Local AI for knowledge work: what small open models can do offlineBlog

Local AI for knowledge work: what small open models can do offline

On the occasion of the AI for Good Global Summit in Geneva, we are open-sourcing the models, datasets, and deployment frameworks presented in this post: the reasoning models framework for RAG, our on-device benchmarking harness for cache-augmented generation, and the French-language retrieval pipeline for Raspberry Pi and Android. Everything described here runs fully offline, on hardware costing less than €100.

Carlos RosasIaroslav Neverov
Carlos Rosas & Iaroslav Neverov
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Telco Common Corpus: an open, verified data commons for telecom AIBlog

Telco Common Corpus: an open, verified data commons for telecom AI

Today we introduce the Telco Common Corpus - 10B+ tokens of fully open telecommunications data, highlighting, as part of the GSMA Open Telco AI initiative, how the company is helping AI work harder for the telecoms sector.

Pleias
Pleias
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Use Cases

Sillon: A Specialised 600M Model for Parisian Subway Operator (RATP) Use Case

Sillon: A Specialised 600M Model for Parisian Subway Operator (RATP)

Pleias trained a 600-million-parameter specialized model for RATP to detect and interpret safety signals in Parisian Subway users’ messages - combining a fully synthetic training pipeline and designed for on-premise deployment. After only three months of development, the model, beating closed models 200x times its size, is now in production at RATP’s sovereign infrastructure on Scaleway.

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Building Offline-First AI for Community Health Workers in West AfricaUse Case

Building Offline-First AI for Community Health Workers in West Africa

Researchers built an AI medical assistant that works without internet for health workers in rural West Africa. It runs on old Android phones and handles local languages to give workers quick treatment guidance.

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SpineDAO & Pleias Partnership In Specialised AI For Spine CareUse Case

SpineDAO & Pleias Partnership In Specialised AI For Spine Care

Pleias and SpineDAO are partnering to build AI systems that safely scale expert spine care for back pain, the world's leading cause of disability. The project tests whether small, structured-reasoning models can outperform large generic LLMs in high-stakes clinical settings.

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Research Highlights

Which Model Should Judge That Language? A Controlled Multilingual Benchmark of Fluency JudgesEvaluation

Which Model Should Judge That Language? A Controlled Multilingual Benchmark of Fluency Judges

Researchers increasingly use large language models as general-purpose evaluators, yet choosing a judge remains difficult when its competence, cost, and latency vary across tasks and languages. In this work, we study this problem for multilingual fluency judgment: assigning a score from 0 to 5 to indicate how natural a text sounds to a native speaker. In an initial pilot on grammatical error correction data, we found wide variation in how much teachers edit broken texts, making comparisons across languages difficult. We therefore introduce the Translationese Detection Benchmark (TDBENCH), built from original-language web texts and three synthetic levels of synthetic translationese: subtle, mild, and heavy. A judge succeeds when it scores the source above its intended degradation. Across 25 languages, detection depends strongly on the language and the strength of the degradation, suggesting that selecting the right judge is sensitive to the target language and the required sensitivity. Among the models we tested, Claude Fable 5.1 achieved the highest estimated macro detection rate (53.5%) albeit at a prohibitive cost. Gemini 3.7 Flash and GPT-6 Astra followed among general-purpose LLMs, scoring 48.7% and 45.8%. Remarkably, the specialized pretrained classifier Jev achieved 47.7% on the benchmark while costing significantly less. We detail these findings in this publication, and provide advice for judge evaluation.

Evaluation
Wikidata Search Traces: A Dataset for Training Knowledge Graph Search AgentsOpen Source

Wikidata Search Traces: A Dataset for Training Knowledge Graph Search Agents

Wikidata is one of the largest open knowledge bases, yet answering a complex question over it still requires a SPARQL query that names the right entities and properties and chains their relations. Language models offer a natural-language alternative but answer largely from memory, which is least reliable for less prominent entities. We study agents that instead answer by exploring the graph, and argue that two obstacles limit them: the lack of training data recording how a solver explores, and interfaces that add large graph results directly to the model's context. We test three hypotheses: that the difficulty of graph search can be controlled through the structure of a question rather than only through obscure entities or wording; that much of the failure on long-horizon search comes from how retrieved evidence is managed rather than from the model itself; and that, in a suitable environment, open-weight models can match commercial closed ones. We construct multi-hop questions on a frozen Wikidata snapshot by replacing named entities with nested conditions, checking after each expansion that the target remains unique and that every new condition is necessary. We release 10,235 solving traces over single-entity and multi-hop questions, together with the recursive language model (RLM) harness that produced them, in which models batch graph calls, keep results in persistent Python state and interpret selected evidence through sub-calls. On 100 questions, the harness improves both models we ran under both interfaces compared with direct tool calling over the same functions: gpt-6-luna rises from 49 to 61 correct answers, doubling its multi-hop accuracy, and Qwen3.8-27B, an open-weight model served on a single GPU, from 60 to 74.

Open Source
It's All Training: A Fully Synthetic Single-Stage Recipe for LLMsTraining Data

It's All Training: A Fully Synthetic Single-Stage Recipe for LLMs

Current pre-training datasets are derived from web crawls, with all their issues, and were not designed to support mid- and post-training pipelines--for instance, they contain little explicit reasoning. Thus, many frontier labs have begun to develop their own internal datasets, starting from state-of-the-art models, to augment their pre-training data mix, eg, with reasoning traces to address cold-start problems. While demonstratively effective, none of these datasets are public, and the effect of this so-called synthetic data on knowledge and skill acquisition of language models, including small ones, remains poorly understood. We present SYNTH, the first open-source synthetic corpus derived from 58,698 Wikipedia articles that collapses pre-, mid-, and post-training into a single training stage via structured amplification of curated encyclopedic seeds. We evaluate SYNTH by training a suite of models: a 56M tiny model (Monad), 0.3B-0.6B dense models (Baguettotron), and a 13B / 1B-active MoE. At iso-compute, SYNTH outperforms filtered web data, and our models remain competitive with similarly-sized open-weight baselines. Because SYNTH is back-translated from grounded passages, SYNTH-trained models achieve high factual precision despite 10-140x fewer training tokens, with memorization targeted by the seed corpus. These results show that synthetic datasets, including our SYNTH dataset, are capable of producing competitive generalist models from a fraction of the training data, enabling rapid iteration as the frontier advances. These findings open up possibilities for both generalist models with significantly increased data efficiency, as well as domain-specific models where no instruction or conversational data is available. Finally, we publicly release our SYNTH dataset and the suite of Baguettotron models under a permissive license, thus supporting open-source language model development.

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