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Custom model fine-tuning

Open-weight models trained on your tasks, your data, your rules. We fine-tune Llama, Qwen, Mistral, Gemma or DeepSeek models on your verified outcomes and hand you the weights, a model card and an eval report. Our production models average 97.4% task accuracy on held-out evals.

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Engagement

What’s included in this service?

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Base model selection

We choose the base family and size for each task, typically 8B–32B parameters, from Llama, Qwen, Mistral, Gemma and DeepSeek, based on measured accuracy, latency and serving cost.

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Supervised fine-tuning and LoRA

Full supervised fine-tuning or LoRA/QLoRA adapters, trained on verified examples captured by BackContext. Most tasks need a few thousand.

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Preference tuning

We train on what your team accepted versus what it rejected, so the model learns your conventions instead of generic best practice.

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Distillation from frontier models

Where your own examples are thin, we distill from frontier outputs your team has reviewed, then train past them on your outcomes.

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Why it matters

Why this service matters

Frontier models are brilliant generalists billed per token. Most businesses run a few hundred specific tasks thousands of times a day. Trained on exactly those tasks, our models score 97.4% against 91.8–93.1% for frontier models, at 46× lower cost per task and 0.4s median latency.

Model weights you own
Model card and eval report
46× lower cost per task
First model in 4–6 weeks
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FAQ

Frequently asked questions

Have more questions?

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Which base models do you fine-tune?

Llama, Qwen, Mistral, Gemma and DeepSeek, usually at 8B–32B parameters. We benchmark candidates on your held-out tasks and pick the smallest model that clears the bar.

How many examples does a task need?

Usually a few thousand verified examples per task. BackContext captures them from the work your team and agents already do, so most customers have enough within weeks.

Do we own the model?

Yes. You receive the model weights, a model card describing data and methods, and an eval report. Your data trains your models and nothing else, and is never pooled with other customers.

How does the model keep improving?

New verified outcomes from BackContext feed the next version. Each version is benchmarked against the last one and against frontier models, and a quality gate blocks any release that regresses.

What happens when the model is unsure?

It ships behind a confidence gate with frontier fallback, so low-confidence tasks route to a frontier model. At DataFoldIT, fallback handles 2.1% of tasks.

Your own model, trained on your work, in production in weeks

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Applied CrewOakland, California

We train AI models on how your company works, and keep them improving.

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