GPT-3

Generative Pre-trained Transformer 3 (GPT-3)
Original author(s)	OpenAI
Initial release	May 29, 2020 (publication); June 11, 2020 (OA API beta)
Repository	github.com/openai/gpt-3
Predecessor	GPT-2
Successor	GPT-3.5 GPT-4
Type	Large language model Generative pre-trained transformer Foundation model
License	proprietary
Website	openai.com/blog/openai-api

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Generative Pre-trained Transformer 3 (GPT-3) is a large language model released by OpenAI in 2020.

Like its predecessor, GPT-2, it is a decoder-only transformer model of deep neural network, which supersedes recurrence and convolution-based architectures with a technique known as "attention". This attention mechanism allows the model to focus selectively on segments of input text it predicts to be most relevant. GPT-3 has 175 billion parameters, each with 16-bit precision, requiring 350GB of storage since each parameter occupies 2 bytes. It has a context window size of 2048 tokens, and has demonstrated strong "zero-shot" and "few-shot" learning abilities on many tasks.

On September 22, 2020, Microsoft announced that it had licensed GPT-3 exclusively. Others can still receive output from its public API, but only Microsoft has access to the underlying model.