ChatGPT 4, which debuted in March, represented a sevenfold increase in large language models' (LLMs) brainpower, which is measured in digital synapses known as parameters, since the original ChatGPT wowed the world in November.

The human brain has an estimated 60 trillion synapses firing. The earliest GPT versions had about 750M parameters; GPT 4 encompassed 4 trillion.

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