TRAIN & FINE-TUNE OPEN MODELS
Turn your proprietary data into a model you own.
Fine-tune open models on your unique data to build models that deliver performance at a lower cost.

The best model for your task
is the one you train yourself.
Frontier models are built to solve arbitrary tasks. Train smaller models to run faster and cheaper on your actual workload. Chalk turns proprietary data into training data, gives you the tools to prove which model performs best, then puts it into production.
Train on your proprietary data.
Build point-in-time-correct datasets and fine-tune open-weight models on the examples that matter to your business.
Evaluate models side by side.
Test open models, fine-tuned models and closed models against the same task. Compare performance so you know which model actually performs best for your task.
Deploy in one click.
Take the model that wins and put it into production. Deploy your custom model on scalable GPU infrastructure in your cloud and serve it fast.
Train and fine-tune models
on the AI data platform for inference.
Chalk brings data, evaluation, and inference into one platform so you can turn proprietary data into a production model that outperforms.
Context Engine
Build point-in-time-correct datasets that reflect your business context. Join and query data across your sources without moving or duplicating data into another platform.
Evaluations
Evaluate models against a determined task. Define evaluations in code or the UI, score with Python or LLM judges, and compare performance with scores.
Compute
Easily deploy the best model for your task with one click. Serve fine-tuned models on scalable GPU infrastructure and expose them through a production-ready endpoint.
AI Router
Use your model where it works best. Route requests across custom models, open models, and frontier models so you can send the right workload to the right model, configure fallbacks, and shift more traffic to your custom model as it improves.
Your Cloud
Keep your data and models in your cloud. Your proprietary data never needs to leave your perimeter. Run models in your own cloud environment, under your existing infrastructure and access controls.
Go deeper on model training.
Your data is your model's advantage.
Cut your model bill.
We'll fine-tune an open model on your data, help you serve it, and show you exactly how it compares on performance and cost.
TALK TO AN ENGINEER

