GPT

TechConcept

GPT (Generative Pre-trained Transformer) is the family of language models developed by OpenAI since 2018.

GPT (Generative Pre-trained Transformer) is the family of language models developed by OpenAI since 2018. It triggered the mass-market explosion of generative AI when ChatGPT launched in November 2022.

GPT models are decoder-only transformers trained to predict the next token on huge text corpora, then fine-tuned with RLHF to follow instructions and respect safety constraints.

The current versions (GPT-4, GPT-4o, GPT-5) are multimodal and accessible via chatgpt.com, the OpenAI API and the major clouds. The term « GPT » is often used loosely to refer to any LLM, but it remains a trademark owned by OpenAI.

Related terms

LLM
An LLM (Large Language Model) is an AI model trained on enormous text corpora to predict the next word (or, more precisely, the next token) in a sequence.
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RLHF
RLHF (Reinforcement Learning from Human Feedback) is a technique for aligning LLMs: after pre-training, the model is fine-tuned using comparisons made by humans between multiple possible responses, so that it adopts the…
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Transformer
The transformer is the neural-network architecture introduced by Google in the paper Attention Is All You Need (2017), which underpins practically every modern generative AI model: LLMs, image, code and multimodal model…
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API
An API (Application Programming Interface) is a software interface that lets one piece of software or service « connect » to another in order to exchange data and features.
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Multimodal
An AI model is called multimodal when it can understand and/or generate several types of data at once: text, image, audio, video — and sometimes other signals like code or structured data.
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ORM
An ORM (Object-Relational Mapping) is a type of program that sits between an application and a relational database to simulate an object-oriented database.
See definition →

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Related terms

LLM

RLHF

Transformer

API

Multimodal

ORM

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