Artificial intelligence · 2022

ChatGPT

A free chat interface reaches 100 million users in about two months.

OpenAI launched ChatGPT on November 30, 2022, built on a GPT-3.5 model tuned with RLHF for dialogue. It hit an estimated 100 million monthly users by January 2023, then the fastest-growing consumer app ever, and started the generative AI boom across every industry.

See it in the living tree Wikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 2

What it led to 1

GPT-4 2023

Related measurements

The dashed line marks when it first worked.

Training compute of notable AI models Source: Epoch AI, Notable AI Models (CC BY 4.0)

Best AI score on GPQA Diamond Latest: 95.8 % correct (2026) Source: Epoch AI, Capabilities & benchmarking (benchmark_data.zip, gpqa_diamond.csv); Anthropic: Claude 3 public launch (March 4, 2024)

Share of people online Latest: 73.6 % (2025) Source: Our World in Data