Utafiti Labs · Aya Open

A multilingual foundation model ecosystem, open to the world.

Aya Open is our flagship open-science effort: production-grade multilingual models, community-built datasets, and governance anyone can audit. Download the weights, study the methods, build on the work.

Download Weights Back to Utafiti Labs

Why Aya Open

Open by design, rigorous by default

Open weights

Full model weights released under permissive terms. Inspect, fine-tune, and deploy them inside your own perimeter — sovereignty starts with possession.

Community datasets

Instruction and evaluation datasets covering dozens of languages, built and curated with a global contributor network and documented provenance.

Open-science governance

Transparent release criteria, public model cards, and reproducible evaluation harnesses. Every claim we make can be independently verified.

Get Started

Everything you need to build

Model weights

Download checkpoints across model sizes, from efficient edge variants to full-scale foundation models, with quantized builds for constrained infrastructure.

Download Weights

Datasets

Multilingual instruction, preference, and evaluation sets with full provenance records — ready for fine-tuning on your proprietary data.

Browse Datasets

Community cookbook

Recipes from the Aya Open community: fine-tuning guides, retrieval pipelines, and deployment patterns for regulated environments.

Read the Cookbook

From Lab to Production

Open research, hardened for the enterprise

Aya Open is where the science happens in public. The breakthroughs proven there — multilingual alignment, retrieval grounding, efficient reasoning — feed directly into our commercial Tafari Core line, hardened, certified, and supported for regulated deployments.

Your models. Your cloud. Your control. Kervalt preserves that standard — whether you build on open weights or deploy Tafari Core in your VPC.

Tafari Core

The enterprise foundation-model line built on Aya Open research — deployed in your VPC, on-premises, or a dedicated, Kervalt-managed Kanda Vault.

Explore Tafari Core