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Custom LLMs

Fine-tune large language models for improved performance on your most important use cases.

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Customize Large Language Models

Scale is proud to partner with OpenAI to provide GPT-3.5 fine-tuning for the world’s leading enterprises. We make it easy to customize LLMs with our enterprise platform, high-quality data, and strategic partnerships with the world’s leading model builders including OpenAI and Meta.

Fine-Tune GPT-3.5

Customize GPT-3.5 with Scale, OpenAI's preferred fine-tuning partner. Our partnership brings together OpenAI's advanced base model GPT-3.5 with Scale's fine-tuning expertise and industry-leading Data Engine to help every company create custom state-of-the-art models for their specific business needs.

Fine-Tuning and Customization for GPT-3.5 

Enhance Data with the Scale Data Engine

Open Source: LLM Engine

Get started with our LLM Engine open-source repository.
With LLM Engine you can customize and host open-source models in just a few lines of code with your data.

Fine-tune and deploy Llama 2, MPT, Falcon, FLAN-T5, GPT-J and more

Host models on your infrastructure


Scale Custom LLMs for your highest priority business use cases. Scale’s fine-tuning platform combined with the Scale data engine supercharges model performance with better data.

Fine-tune leading models including GPT-3.5 Turbo and other leading open-source models.

Optimized Retrieval Augmented Generation (RAG) with citations, advanced reranking, and RAG fine-tuning.

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Thanks to companies like Scale, a lot of these SaaS tools are building intelligent capabilities into their products[...] that’s a path for a lot of companies to get value from AI without becoming AI shops, which is a really formidable challenge

Bret Taylor

Retired President & COO, Salesforce

Scale has a great focus on helping companies improve the quality of their data and the usability of their data. Scale has seen so many different applications of AI across so many different kinds of companies. I think it’s well positioned to help a company assess where it is, what’s the state of its data, what’s the state of its systems, and what kind of capability and preparedness to use sophisticated algorithms.

Jeff Wilke

Retired CEO, Amazon Worldwide Consumer, Amazon Worldwide Consumer


Scale Pioneered RLHF and Fine-Tuning LLMs With Better Data

Scale has worked with OpenAI since 2019 on powering LLMs with better data. Scale's Data Engine has powered most of the leading LLMs, and we are proud to be OpenAI's preferred partner for fine-tuning GPT-3.5 Turbo.

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OpenAI GPT-3.5 Fine-Tuning Partnership

Scale is proud to be OpenAI's preferred partner for GPT-3.5 fine-tuning.

Meta Llama 2 Launch Partner

Scale is proud to be a Meta Llama 2 launch partner.

OpenAI Process Supervision

Scale built PRM800K to improve mathematical reasoning with process supervision.

Why Customize Your Own Model?

Your Challenges Are Unique. Your Model Should Be Too.

Base models are trained on publicly available internet data, not on a law firm's private documents, a wealth manager's research reports, or an accounting firm's financial statements. This specific data and context is the key to helping a model go from generic responses to actionable insights for specific use cases.


 Models customized with your proprietary data perform better at your high-priority tasks.


Customize models to your specific use cases, and shape how they respond to common scenarios so they can be an effective extension of your brand.


Enhance the safety of your models with human-in-the-loop testing, evaluation, and monitoring.


Customize Your Models With Scale Data Engine

Scale’s Generative AI Data Engine will supercharge your custom LLMs by enabling greater capability, customizability, and safety through properly harnessing the power of your data.


Powering the next generation of Generative AI

Scale Generative AI Data Engine powers the most advanced LLMs and generative models in the world through world-class RLHF, data generation, model evaluation, safety, and alignment.

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Start Customizing LLMs Today

With our open-source repo LLM Engine you can customize and serve open-source models in just a few lines of code using your own data. Get started now by downloading the repo from Github.

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