LLM Fine-Tuning Services
Custom Language Model Training for Your Data, Voice, and Workflows
Large language models are powerful—but generic. At LLM.co, we help you fine-tune open-source models like LLaMA, Mistral, and Falcon to speak your language, understand your business, and perform your tasks with precision.
Whether you're building a domain-specific chatbot, automating internal knowledge retrieval, or replacing clunky enterprise search, fine-tuning ensures your model is aligned with your data, brand, and performance goals.
End-to-end LLM fine-tuning services to help you personalize and specialize large language models using your domain data, tone, workflows, and knowledge
What is LLM Fine-Tuning?
LLM fine-tuning is the process of continuing the training of a pre-trained language model using your own proprietary or domain-specific data. This allows the model to specialize—learning your terminology, understanding your use cases, and generating output that’s accurate, relevant, and aligned with your brand or industry standards.
Unlike prompt engineering (which guides a model) or retrieval-augmented generation (which bolsters a model with external search), fine-tuning actually modifies the model’s internal parameters—producing more fluent, fast, and native understanding of your domain.
Mapping & Data Discovery
We work with you to define where a fine-tuned model will provide the most value—support automation, content generation, Q&A, summarization, or internal agents—and identify which data to use.
Dataset Curation & Preparation
Your raw data is only valuable if it’s properly formatted. We help clean, tokenize, structure, and annotate your files (PDFs, chats, JSON, FAQs, SOPs, HTML, etc.) into training-ready datasets.
Model Selection & Training Pipeline
We guide you in choosing the right base model (LLaMA, Mistral, Falcon, GPT-J, etc.) and fine-tuning method (full fine-tuning, LoRA, QLoRA, PEFT) based on compute budget, use case, and privacy needs.
Model Training & Evaluation
We run multiple training iterations, evaluate output quality, and test for bias, hallucination rate, and alignment with your goals. We can even simulate real usage conditions to validate outputs.
Model Packaging & Deployment
Once trained, we package your model into secure, portable containers. We can deploy via API, integrate it into your existing software, or host it for you on a cloud or edge environment.
Ongoing Iteration & Reinforcement
We offer continual improvement cycles—incorporating user feedback, new data, and human preference (RLHF)—so your model keeps learning and improving over time.
Why Fine-Tune an LLM?
Generic language models are trained on vast swaths of internet data. While that may include your industry, it likely doesn't include your company’s unique language, workflows, or knowledge. Fine-tuning bridges that gap by embedding your proprietary data directly into the model’s neural architecture, creating a version of the LLM that thinks and responds in ways aligned with your world.
A fine-tuned model reduces hallucinations and improves factual accuracy, especially in niche or regulated domains. It allows you to align the model’s tone and writing style with your brand voice and messaging standards. Performance improves across specific queries and workflows, especially when compared to general-purpose models that require complex prompting just to stay on topic. Fine-tuning also enables you to replace large, bloated models with smaller, faster alternatives that are more efficient and easier to deploy—especially when tuned for a narrow domain.
Ultimately, fine-tuning gives you more control over compliance, behavior, and reliability. Whether you're in healthcare, law, finance, SaaS, or any other data-rich vertical, a fine-tuned model becomes a smarter, more accurate, and more controllable AI assistant—tailored to your needs, your team, and your customers.
Use Cases for LLM Fine Tuning
Fine-tuning can transform generic models into domain experts:
Enterprise Knowledge Retrieval
Trained on internal wikis, SOPs, and documentation to power secure internal agents that answer employee questions quickly and accurately.
Legal Assistants
Trained on contracts, regulations, statutes, and case law for precise clause extraction, summarization, and interpretation.
Healthcare Agents
Tuned on clinical notes, medical knowledge, ICD/CPT codes, and treatment guidelines for accurate documentation and decision support.
Financial Analysts
Trained on earnings reports, investor documents, tax codes, and SEC filings to summarize, explain, and analyze financial narratives.
Customer Support Bots
Tuned on historical tickets, knowledge bases, and product manuals to answer common questions with accurate, brand-aligned responses.
E-learning & Tutoring
Models trained on your curriculum or training manuals to deliver adaptive teaching content or skill-based reinforcement.
Why LLM.co?
LLM.co is your partner in custom AI performance. We don’t just fine-tune models—we build intelligent systems that work in the real world.
Whether you're looking to supercharge your team, automate your workflows, or create a branded AI assistant, LLM.co helps you build a model that knows you.
Private LLM Blog
Follow our Agentic AI blog for the latest trends in private LLM set-up & governance
FAQs
Frequently asked questions about our LLM fine-tuning services
No. These models are closed-source and don’t allow external fine-tuning. However, we can create models with comparable performance using open-weight foundations—fully under your control.
As little as a few thousand examples can provide meaningful improvement. We can also augment your data with synthetic generation or hybrid instruction-based training.
RAG retrieves data at inference time. Fine-tuning bakes knowledge into the model. RAG is easier to update, while fine-tuning produces faster, more fluent output. We can combine both for optimal results.
Yes. We offer secure hosting options with APIs, dashboards, and usage controls—or help you deploy on your own infrastructure.
Pricing depends on model size, training hours, dataset complexity, and hosting. Reach out for a custom quote based on your goals.