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Accepting a customized model for team use
Short answer
Buy fine-tuning with an acceptance agreed before the project ends: a set of cases the model has not seen, criteria for correctness, acceptable errors and the person who takes over cases that need checking. A demo of a few correct answers does not tell you whether the version that goes into the application meets these conditions.
How we workDetails ↓
- 01Call30 minutes with an engineer, free
- 02PrototypeA working system on your process and data, free
- 03ImplementationTarget and fixed price in the contract; 50% at signing
- 04Acceptance50% once the agreed target is met
- model on your server or in the cloud in the EU
- quoted after the review
- same work in application with EU cloud model
- from €3,000
- task, data and equipment analysis
- €0
We belong to the OpenAI and Anthropic partner programmes and learn through their official courses. What this means ↓
Author: Syntalith · 3 min read
Statistics
Buying fine-tuning: statistics 2026
30 h
a month fewer corrections at 1,500 cases: a clear instruction with sources cuts errors from 20% to 10%, fine-tuning to 5%. Scenario.
14–56%
According to Anthropic (2025), AI cut task time by 14 to 56% in studies with a control group.
Source: Anthropic, Estimating AI productivity gains (2025) ↗
50%
According to the European Commission (2026), half of the small and medium-sized companies in the EU name high investment costs as a barrier to AI.
Source: European Commission, Flash Eurobarometer 578 (2026) ↗
48%
According to the European Commission (2026), 48% of small and medium-sized companies in the EU name a lack of expertise as a barrier to AI.
Source: European Commission, Flash Eurobarometer 578 (2026) ↗
42%
According to the European Commission (2026), 42% of small and medium-sized companies and mid-caps in the EU already use AI, mostly in a limited and experimental way.
Source: European Commission, Flash Eurobarometer 578 (2026) ↗
Figures checked: 22 October 2026
Acceptance concerns the version that will go into the application, with the same prompt and the same input data as in daily work. The model shown in a demo may have worked with a different prompt or on chosen examples. According to the European Commission (2026), 42% of small and medium-sized companies and mid-caps in the EU already use AI, mostly in a limited and experimental way, so a measurable acceptance is also the basis for counting the return later.
- A set of cases not used for training
- Correctness criteria for each kind of error
- A comparison with a simpler change on the same set
- The acceptable error level and the cases for a person
- An owner of corrections after acceptance
A demo may answer a different question from acceptance
Suppose a model reads product names from orders. In the demo it recognises clear messages well. In daily work, though, some descriptions do not show the product variant. The buyer has to see whether the application leaves such an entry for clarification and whether the employee can go back to the original.
Acceptance should not require guessing the missing variant. It should cover the agreed behaviour when the description is incomplete. The contractor and the client have to understand in advance when a result is a useful proposal and when it needs manual work.
Hugging Face separates material for training, tuning and the final evaluation of a model. In a purchase, this means you need cases on which the result is checked after the adaptation is finished. Correcting the model again and again against the same examples weakens the value of such an acceptance.
What to agree before the project ends
The criteria should describe the specific use and the kinds of mistakes the team can judge. When reading orders, a wrong variant and a missing proposal lead to different work. The process owner explains which errors make the result unusable and which the employee can correct easily in the view provided.
You also need to name the model and application version under assessment. If the way text is delivered or the product list changes after the trial, the earlier result may not describe the new set-up. The buyer should receive a clear record of what was checked and what the trial did not cover.
A list of known limits helps set the scope of the launch. It need not stop the whole project: some cases can stay manual. What matters is that users know about this limit and that the person responsible for acceptance accepts it knowingly.
A correction after acceptance also needs an owner
Before the work ends, agree where an employee reports a mistake and who assesses its cause. A model error, missing information in the source and a change in a company rule may need different actions. A general promise of support does not say how the team will handle the first hard case.
In a conversation with Syntalith, the client brings the task, the people who assess the results and the expected way of using them. The proposed acceptance material combines examples of answers, a description of the remaining limits and a decision on the scope of further use. Contract terms and later maintenance need a separate agreement.
Describe a situation in which an employee could not use the model's answer. That is a good start for a conversation about model acceptance. We price a private model after a free conversation about the task, the data and the hardware. An application that uses the model starts from €3,000 net (pricing).
What it costs
- Today: 20% errors × 1,500 × 8 min
- 40 h (€1,396)
- After a change without training (a clear instruction with sources): 10%
- 20 h (€698)
- After fine-tuning: 5%
- 10 h (€349)
Fine-tuning adds 10 h (€349) a month beyond the simpler change
The error shares and the correction time are the scenario's assumptions, which we measure on cases not used for training. €34.90 an hour is the EU average hourly labour cost for 2025 according to Eurostat.
- Cases for assessment kept apart from training examples
- The same set for the current solution, the simpler change and the new model
- Decisions by the people who correct the results today
- Errors counted separately for each kind of mistake
Where to start
In the free review we choose one process and 20 to 100 cases the team has already handled. We compare the simpler change with an adapted model on cases the model has not seen, and within 2 working days you receive a written summary with a price. We adapt models as part of private LLMs, and build the application as part of AI apps.
Worked example · Scenario
How we count the payback: an adapted model
We run the same count for your team in the free review.
€4,188
a month for the work on 600 questions
EU cloud version payback: 0.8 mo.
Our assumptions are 12 minutes to find an answer in the documentation, and checking in 15% of the old time. €34.90 an hour is the EU average hourly labour cost for 2025 according to Eurostat, for companies with 10 or more employees. Model cost: Claude Sonnet 5.5, about 6,000 + 500 tokens per answer in the EU cloud version, at the ECB rate of 1.1205 USD per euro on 22 October 2026. We count the payback for an app with a model in the EU cloud (from €3,000 net). We price the model on your server after a call, and the cost of people's work stays the same.
See the full calculation →