Question 1

What is a custom LLM or custom GPT?

Accepted Answer

It is an AI language model set up for your business, using your knowledge, rules and tone. It may use retrieval over your documents, fine-tuning on your examples, or both, depending on the task.

Question 2

How much does custom LLM development cost in the UK?

Accepted Answer

Cost depends on data, model choice, hosting and integrations. Custom GPT and RAG projects usually start from [£X], while fine-tuning and private hosting start from [£X]. Running costs are explained upfront.

Question 3

Do we need fine-tuning or RAG?

Accepted Answer

Most businesses start with RAG, which keeps answers grounded in your latest documents. Fine-tuning helps when you need a specialist style, format or task. We test both and recommend the best fit.

Question 4

Is our data safe?

Accepted Answer

Yes. We use enterprise AI services that don't train on your data, or host open-source models privately in your own cloud, with encryption, access controls and UK GDPR-conscious data handling.

Question 5

How long does a custom LLM project take?

Accepted Answer

A custom GPT or RAG system can be ready in 3–6 weeks. Fine-tuning, private hosting and larger knowledge bases usually take 6–12 weeks, including accuracy testing and refinement.

Question 6

How do you stop the model making things up?

Accepted Answer

We ground answers in your approved sources with citations, add guardrails, test against real questions and make the model say when it doesn't know, rather than guessing an answer.

Question 7

Can you host an LLM privately?

Accepted Answer

Yes. We deploy models on Azure OpenAI, AWS Bedrock or your own GPU servers using open-source models such as Llama and Mistral, so sensitive data never leaves your environment.

Question 8

Can the custom LLM connect to our systems?

Accepted Answer

Yes. We connect it to your CRM, helpdesk, intranet and databases, and can let it take actions through AI agents , with permissions and approval steps for anything important.

Question 9

Can we add a custom LLM to our own product?

Accepted Answer

Yes. We build LLM features such as copilots, smart search and content generation into SaaS products and apps. Our AI integration team keeps costs and speed under control.

Question 10

Which models do you work with?

Accepted Answer

We work with OpenAI, Anthropic and Google models, plus open-source options such as Llama and Mistral, choosing based on accuracy, speed, cost, privacy and whether self-hosting is required.

Question 11

Do we own the model and data?

Accepted Answer

Yes. You own your data, prompts, knowledge pipelines and any fine-tuned model weights we create for you, subject only to the licence terms of the underlying base model you choose.

Question 12

Do you provide support after launch?

Accepted Answer

Yes. We monitor answer quality, cost and usage, refresh knowledge as documents change, retest after model updates and keep improving accuracy as we learn from real usage.

Custom LLM & GPT Solutions in London

Custom LLM solutions built on your own data

Custom GPT Development

RAG & Knowledge Systems

LLM Fine-Tuning

Private LLM Deployment

A clear custom LLM process from data to deployment

Use Case & Data Review

Model & Architecture Choice

Build & Training

Evaluation & Guardrails

Deployment & Monitoring

Why custom LLMs outperform generic AI tools

Complete custom LLM & GPT services

LLM Strategy & Discovery

Custom GPT Assistants

RAG Development

Knowledge Base Ingestion

LLM Fine-Tuning

Open-Source Models

Private Cloud Hosting

Prompt Engineering

Evaluation & Testing

Guardrails & Safety

LLM APIs & Integration

Monitoring & Optimisation

Ready for an AI model that knows your business?

Custom LLM expertise across key industries

Hospitality & Leisure

A London custom LLM partner focused on quality and commercial results

Accuracy you can measure

Your data stays yours

Custom LLM technologies we work with

What clients say

Sarah Jenkins

David Thorne

Amara K.

Julian Reed

Emily Watson

Marcus Sterling

Brands we have worked with

Custom LLM & GPT Solutions FAQs

What is a custom LLM or custom GPT?+−

How much does custom LLM development cost in the UK?+−

Do we need fine-tuning or RAG?+−

Is our data safe?+−

How long does a custom LLM project take?+−

How do you stop the model making things up?+−

Can you host an LLM privately?+−

Can the custom LLM connect to our systems?+−

Can we add a custom LLM to our own product?+−

Which models do you work with?+−

Do we own the model and data?+−

Do you provide support after launch?+−

Tell us about your project