ZECH
AI Development · Build

Fine-tuning when the evidence says it is worth it, and not before.

We help you choose between better prompts, retrieval, fine-tuning and training a custom model by testing each on your task. When adaptation pays off, we prepare the data, train, evaluate and deploy the adapted model with a clear view of cost and quality.

What we deliver
  • Approach comparison
  • Training dataset
  • Adapted model
  • Evaluation report
  • Serving and retraining setup
Tools & platforms
Hugging Face TransformersLoRA and other parameter-efficient methodsProvider fine-tuning APIsPyTorchvLLM

Where this helps

Prompts have hit a ceiling
The model gets close, but no amount of prompt editing makes it follow your format, terminology or judgment consistently across thousands of cases.
Fine-tuning as a first resort
A team plans to fine-tune because it sounds rigorous, without checking whether retrieval or better examples would solve the problem for less.
The large model is too slow or costly
A capable general model does the job, but latency or per-request cost rules it out at production volume.

What we deliver

01
Approach comparison
Prompting, few-shot examples, retrieval and fine-tuning tested side by side on your evaluation set, with a recommendation and the reasoning behind it.
02
Training dataset
Curated, de-duplicated and reviewed input-output examples drawn from your data or expert annotation, with sensitive fields handled appropriately.
03
Adapted model
A fine-tuned or distilled model — using hosted fine-tuning or parameter-efficient methods on open-weight models — versioned with its data and settings.
04
Evaluation report
Quality, latency and cost compared against the unadapted baseline, including regressions on tasks the model previously handled well.
05
Serving and retraining setup
Deployment of the adapted model and a documented process for refreshing it as data or base models change.

How it works

  1. 01

    Define the gap

    We establish exactly where the current model falls short, using examples your experts have judged.

  2. 02

    Try the cheaper options

    Improved prompts, examples and retrieval are tested first. If they close the gap, we stop there.

  3. 03

    Prepare data

    When adaptation is justified, we build and review the training set and hold back a clean test set.

  4. 04

    Train and compare

    Training runs are tracked and compared, with attention to overfitting and loss of general ability.

  5. 05

    Deploy and watch

    The adapted model is released behind the same evaluation gates as any other change and monitored in production.

Design decisions we make with you

  • Is adaptation necessary?

    Fine-tuning teaches style, format and narrow judgment well; it is a poor way to add changing facts, which retrieval handles better.

  • Hosted or open-weight

    Provider fine-tuning is quicker to start; open-weight models give more control over hosting and data. Not every model can be fine-tuned or self-hosted.

  • Data rights and quality

    Training data must be yours to use, representative of real inputs, and reviewed. A small clean set often beats a large noisy one.

  • Smaller, specialized models

    Distilling a large model's behavior into a smaller one can cut latency and cost for high-volume tasks, at the price of generality.

  • Maintenance burden

    An adapted model needs retraining when base models or your data change. We weigh that ongoing cost in the recommendation.

Questions buyers ask

They solve different problems. Retrieval gives the model up-to-date facts from your documents; fine-tuning changes how the model behaves. Many systems need retrieval only. See RAG & Enterprise Knowledge Systems.

It depends on the task and how consistent the examples are. Quality matters more than volume, so we train on a subset first and check whether adding more data still improves results before committing.

No. Some providers do not offer fine-tuning for every model, and some licenses restrict it. We check what is possible for the models you are considering.

It can. We test for regressions on related tasks and keep the base model available for work outside the adapted scope.

Discuss this capability with an engineer.

Tell us about the workflow or product. We reply with questions, a suggested first step and who would work on it.