Large Language Models (LLMs) such as GPT, LLaMa, and others, stand as towering giants, transcending their initial design as mere computational curiosities. These models have evolved into multifaceted tools, capable of crafting poetry, writing code, and undertaking specialized tasks. This blog delves deep into the methods of customizing LLMs, aiming to maximize their efficacy and adaptability in the ever-changing landscape of AI.
The follow up blogs will deep dive into one training method at a time and walk through the process with specific examples while highlighting the benefits and pitfalls. The follow up blogs will also take a business view on how companies could offer differentiating models with minimal investment as well the kind of problems they need to approach for extracting most value from generative AI.
Let us now focus on learning the types of customizations and their summaries.
The Essence of LLM Customization
The LLM customization can be broadly classified under three method methods: fine-tuning, Retrieval-Augmented Generation (RAG), and prompt engineering. Each method offers a unique pathway to refining the abilities of LLMs, tailoring them to meet specific requirements and challenges.
Fine-Tuning: The Art of Specialization
Fine-tuning represents the targeted training of LLMs to excel in specific domains, such as law or healthcare. This process resembles the act of imparting specialized vocabulary and practice tasks to a novice in a particular field. Fine-tuning bifurcates into two distinct categories:
- Instruction-Based Training: Here, the LLM is taught specific commands. For instance, if legal summaries are needed, the LLM is instructed to analyze contracts and provide concise overviews. Through this, it learns to identify key clauses and generate succinct summaries.
- Domain-Based Training: This approach is akin to immersing the LLM in a sea of relevant data. Feeding it a plethora of medical articles, for example, would make it proficient in writing patient summaries or formulating research questions.
While instruction-based models like DoNotPay, TabNine, Socratic AI, and Bard are prevalent, domain-trained models like Google’s Megatron-Turing NLG and OpenAI’s Jurassic-1 Jumbo showcase the breadth of this training method. It’s noteworthy that domain-based training demands significantly more computational and storage resources due to the sheer volume of data involved.
Retrieval-Augmented Generation: Enhancing Through External Sources
RAG stands as a cornerstone in LLM customization, functioning akin to a well-equipped research assistant. It enhances LLM responses harnessing a plethora of external sources. This method involves several key processes:
- Data Transformation: Converting raw data into understandable information.
- Embeddings: These capture the essence of words, providing a nuanced understanding.
- Chunking and Indexing: These techniques ensure the efficient organization of information.
Models like Google AI’s REALM, Facebook AI’s RAG-token, and Microsoft’s Fusion-in-decoder are exemplary in leveraging RAG capabilities. However, the extensive text corpus and knowledge base required for RAG training make it a resource-intensive endeavor.
Prompt Engineering: Mastering the Art of Instruction
Prompt engineering is essentially about crafting the right questions to unlock the hidden potential of LLMs. This involves two primary subcategories:
- Zero-Shot Learning: This technique employs minimal data and operates without examples, relying on the innate abilities of the LLM.
- Few-Shot Learning: In contrast, this method involves providing a handful of examples to guide the LLM towards the desired output.
Remarkably, prompt engineering demands the fewest computational and storage resources compared to other training forms. The efficacy of the results in prompt engineering lies in the ability of LLM’s (or the interfacing agent) to contextualize the prompt.
Broadening the Scope: Agents, Adapters, and Human-in-the-Loop Techniques
While training and prompting lead to highly specialized LLMs, certain knowledge infusion techniques are crucial for enhancing their effectiveness. These include Agents, Adapters, and Human-in-the-Loop Techniques.
- Agents serve as intermediaries, guiding the LLM’s focus and decision-making processes. For instance, in analyzing customer reviews, an agent could steer the LLM to generate targeted responses, thereboosting customer satisfaction.
- Adapters function as specialized modules that enhance the LLM’s capabilities for specific tasks. Adding a factual verification module to prevent misinformation dissemination is a fitting example.
- Human-in-the-Loop Techniques involve integrating human feedback into the LLM’s output refinement process, akin to an experienced editor polishing a writer’s draft. This approach ensures alignment with human values and expectations.
The Broader AI Landscape: LLMs and Beyond
LLMs represent a subset of Multi-modal Generative Models (MMGMs), which harmonize modalities like image, audio, and other forms of code. This contrasts with discriminative AI models, which have been popular for tasks like classification, prediction, and sentiment analysis. However, the emergence of platforms like OpenAI’s Chat-GPT signifies a paradigm shift towards generative models.
The ultimate power of AI lies in the collaboration between well-trained MMGM and Discriminative AI models, interfaced seamlessly through agents and adapters. This synergy unlocks AI’s true potential for ubiquity and versatility.
Concluding Remarks: The Need for Caution and Continuous Learning
In conclusion, while the advancement of LLMs offers exciting prospects, there are pitfalls that need attention. Specialized LLMs can suffer from narrow-minded expertise, amplifying biases and struggling to explain their insights to non-specialists. This can lead to the creation of echo chambers. To mitigate these risks, regular and well-designed retraining of models is essential.
However, the LLMs (more broadly multi-modal generative models) and their encapsulation with discriminative AI models offer valuable and powerful tools in institutionalizing knowledge and innovation at AI-speed (read God-speed). The transformative impact of the customized generative models that continuously learn from their environment and communicate with insights will be all powerful. Imagine having an FDA inspector (read MMGM) in a pharmaceutical manufacturer’s plant long before the new drug application is submitted to FDA. Imagine a line plan planner (read MMGM) with real-time knowledge of immense broad data helping a retailer plan an optimal season line-plan along with sourcing plan. Imagine a medical expert (read MMGM) reading medical records and providing expert medical advice based on the patterns that human doctors may overlook. Imagine a lawyer (read MMGM) at your fingertips providing the key advice on varied specialized topics ranging from mercantile to corporate to immigration law. So on. All at affordable prices and comparable (maybe, superseding in the future) accuracy from humans.
