What is LLM integration?
LLM integration is the process of connecting a large language model — GPT-4o, Claude, Mistral or an
open model — to your existing software so it can read context, take actions and return useful output.
It's more than calling an API: you need to design prompts, manage context windows, handle retrieval,
deal with latency and build guardrails before you have something reliable in production.
How do you integrate an LLM into existing software?
We start with an audit of your current stack and data flows. Then we design the integration
architecture — choosing the right model, deciding how to pass context and where to add retrieval.
We implement against your existing APIs and databases, write automated evals and set up monitoring.
Every project follows the same path: Audit → Architecture → Integration → Deploy & Monitor.
What's the difference between RAG and fine-tuning?
RAG (Retrieval-Augmented Generation) retrieves relevant documents at query time and injects them
into the prompt — no retraining, data stays fresh, fast to iterate. Fine-tuning updates the model
weights on your data — better for stable style, tone or narrow domain tasks where the training corpus
doesn't change often. Most production systems start with RAG. Fine-tuning is added when RAG alone
can't close the quality gap.
How long does LLM integration take?
A focused integration — one feature, one model, existing API — typically takes 2–4 weeks from audit
to first production deploy. Full RAG pipelines with custom retrieval and monitoring land in 4–8 weeks.
Timeline depends on data readiness, access to your codebase and how many approval cycles your
organization needs.
Do you work with any LLM provider?
Yes. We work with OpenAI, Anthropic, Google, Mistral, Meta (Llama), Cohere and self-hosted open
models. We help you choose the right model for cost, latency and capability, and design the
integration so you can swap providers without rewriting your application logic.
What does LLM integration cost?
Project-based engagements start at $8,000 USD for a scoped integration. Ongoing consulting retainers
are available for teams that need recurring architecture support, prompt engineering and model
evaluations. Write to
hola@luz.uy
with a brief description of your use case and we'll send a scoped proposal within 48 hours.