GPT-3.5 vs GPT-4: A Comprehensive Comparison of Features and Improvements

Last Updated on May 1, 2023 by Freddy Reyes


As artificial intelligence (AI) advances, language models have become increasingly powerful tools for various applications. Two of the most prominent models in this domain are OpenAI’s GPT-3.5 and GPT-4. This article will comprehensively compare their features, highlighting the key differences and improvements of GPT-4 over GPT-3.5.

  1. Model Size and Architecture

GPT-3.5, the predecessor of GPT-4, was a massive language model with 175 billion parameters. Its impressive performance was made possible through its Transformer architecture, which enabled it to excel at various tasks such as translation, summarization, and question-answering.

GPT-4, on the other hand, boasts an even larger number of parameters, further improving its capabilities. Its architecture is based on the same Transformer design but with additional refinements to enhance efficiency, reduce computational demands, and improve performance across various tasks.

  1. Fine-tuning and Customization

GPT-3.5 allowed users to fine-tune the model on specific tasks or datasets, which increased its adaptability and usefulness across different domains. However, fine-tuning required substantial computing power and expertise to execute effectively.

With GPT-4, the fine-tuning process has become more user-friendly and efficient. Improved optimization techniques allow for faster convergence, meaning users can perform better with fewer training iterations. This makes GPT-4 more accessible and customizable for a broader range of applications.

  1. Context Length and Understanding

One of the limitations of GPT-3.5 was its context length, which restricted the model’s ability to process and understand longer texts. This made it challenging for GPT-3.5 to handle certain tasks, such as summarizing lengthy documents or engaging in extended conversations.

GPT-4 has addressed this limitation by increasing the maximum context length, allowing it to process and understand longer texts. This improvement enables GPT-4 to perform better in tasks requiring a deeper understanding of context and relationships within the text.

  1. Few-shot Learning

GPT-3.5 was renowned for its few-shot learning abilities, which enabled it to perform tasks with minimal examples or demonstrations. This feature set it apart from earlier language models and allowed it to generalize across various studies.

GPT-4 has further built upon this capability, showcasing impressive few-shot learning performance. By leveraging its larger parameter size and refined architecture, GPT-4 can learn new tasks more efficiently and with fewer examples, making it a more powerful and versatile tool for various applications.

  1. Safety and Ethical Considerations

GPT-3.5 and GPT-4 have raised concerns regarding their potential misuse and the ethical implications of their deployment. With the increased capabilities of GPT-4, addressing these concerns has become more critical than ever.

OpenAI has tried to mitigate potential risks associated with GPT-4, including refining its content filtering mechanisms, engaging in external audits, and soliciting public input. While the challenges related to AI safety and ethics are ongoing, GPT-4 represents a step forward in addressing these concerns and fostering responsible AI development.


In summary, GPT-4 has made significant advancements over its predecessor, GPT-3.5, in model size, fine-tuning capabilities, context length, few-shot learning, and safety measures. These improvements make GPT-4 an even more powerful and versatile language model with broad applications across numerous domains.