Summary of OpenAI's GPT model versions:
GPT-1 (2018): First Transformer-based model, small-scale proof of concept.
GPT-2 (2019): 1.5 billion parameters, showcased strong text generation; initially withheld due to safety concerns.
GPT-3 (2020): 175 billion parameters, popularized few-shot learning across diverse tasks.
GPT-4 (2023): Multimodal (text and images); includes faster, cost-efficient versions like GPT-4-turbo, GPT-4o , GPT-4o mini and models for complext reasoning like o1-preview and o1-mini
Future - GPT-5: In development; expected to expand multimodal capabilities and increase efficiency, though details remain speculative.
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