AI Timeline
A chronological overview of significant milestones in artificial intelligence history, from foundational concepts to modern breakthroughs.
2026
Current year - ongoing developments
2025
Claude Code Released - Claude Code was released in February 2025 as an agentic command line tool that enables developers to delegate coding tasks directly from their terminal. It initially launched as a research preview, and was then made generally available in May 2025 alongside the Claude 4 release. A web-based version followed in October 2025, making it accessible without a local terminal setup.
Claude Cowork Released - Desktop applicaton. Available for Mac Silicon only, not Intel-based, and PCs.
Claude 4 Series Launch - Anthropic released the Claude 4 family of models, including Claude 4 Opus and Claude 4 Sonnet, representing significant advances in reasoning, coding, and multi-step task completion.
2024
GPT-4o Released - OpenAI released GPT-4o (the "o" stands for "omni"), a multimodal model that can process text, audio, and images with significantly improved speed and reduced costs.
Claude 3 Family - Anthropic introduced Claude 3 (Opus, Sonnet, and Haiku), with Claude 3 Opus matching or exceeding GPT-4's performance on many benchmarks.
Gemini 1.5 - Google DeepMind released Gemini 1.5 with a breakthrough 1 million token context window, enabling analysis of entire codebases, long documents, and hours of video.
AI Safety Institute - Multiple countries established AI Safety Institutes to study and mitigate risks from advanced AI systems.
2023
GPT-4 Launch - OpenAI released GPT-4 in March, demonstrating significant improvements in reasoning, creativity, and multimodal capabilities (text and images).
Llama 2 Released - Meta released Llama 2, a collection of open-source large language models ranging from 7B to 70B parameters, democratizing access to powerful AI.
Google Bard Launched - Google released Bard (later renamed Gemini), its conversational AI chatbot to compete with ChatGPT.
Midjourney V5 - Major advancement in AI image generation quality and prompt adherence.
AI Regulation Begins - The EU moved forward with the AI Act, establishing the first comprehensive legal framework for AI regulation.
2022
ChatGPT Released - ChatGPT was introduced on November 30, 2022, by OpenAI. Built on the GPT-3.5 model, it quickly became a massive hit, reaching an estimated 100 million users within about two months of launch — making it one of the fastest-growing consumer applications in history.
Stable Diffusion Open-Sourced - Stability AI released Stable Diffusion as open-source, making high-quality text-to-image generation widely accessible.
DALL-E 2 Released - OpenAI launched DALL-E 2, demonstrating unprecedented ability to create realistic images from text descriptions.
AlphaCode - DeepMind released AlphaCode, an AI system capable of competing in programming competitions at a human competitive level.
2021
Anthropic Founded - The company Anthropic, headquartered in San Francisco, was founded in 2021 by Dario Amodei and Daniela Amodei, along with several other former OpenAI researchers and staff, with a focus on AI safety and research.
GitHub Copilot Launch - GitHub and OpenAI launched Copilot, an AI pair programmer that suggests code completions using GPT-3 Codex.
DALL-E Introduced - OpenAI introduced DALL-E, the first major text-to-image AI model, demonstrating the potential of multimodal AI.
AlphaFold 2 - DeepMind's AlphaFold 2 solved the protein folding problem, a 50-year challenge in biology, with breakthrough accuracy.
2020
GPT-3 Released - OpenAI released GPT-3 with 175 billion parameters, demonstrating unprecedented language generation capabilities and few-shot learning.
COVID-19 Accelerates AI Adoption - The pandemic accelerated adoption of AI in healthcare, remote work tools, and drug discovery efforts.
2019
OpenAI Restructuring - OpenAI, in order to attract more funding, created a "capped-profit" subsidiary in 2019. OpenAI is currently in the process of restructuring into a for-profit entity.
GPT-2 Released - OpenAI released GPT-2, initially withholding the full model due to concerns about misuse, sparking debate about responsible AI release.
BERT by Google - Google introduced BERT (Bidirectional Encoder Representations from Transformers), revolutionizing natural language understanding and search.
2018
AlphaFold 1 - DeepMind introduced AlphaFold, beginning its groundbreaking work on protein structure prediction.
GPT-1 Released - OpenAI released the first Generative Pre-trained Transformer (GPT), demonstrating the potential of transformer-based language models.
Dota 2 AI Victory - OpenAI Five defeated professional Dota 2 players, showcasing reinforcement learning's potential in complex strategic games.
2017
Transformer Architecture - Google researchers published "Attention Is All You Need," introducing the Transformer architecture that would become the foundation for modern LLMs.
AlphaGo Zero - DeepMind released AlphaGo Zero, which learned to master Go entirely through self-play without human game data, surpassing previous versions.
2016
AlphaGo Defeats Lee Sedol - DeepMind's AlphaGo defeated world champion Go player Lee Sedol 4-1, a landmark moment showing AI could master complex strategic games once thought beyond computer capability.
Word2Vec and Embeddings - Word embedding techniques became mainstream, enabling better representation of language meaning in numerical form.
2015
OpenAI Founded - OpenAI was founded in December 2015 by Sam Altman, Elon Musk, Greg Brockman, Ilya Sutskever, and several others. It was originally established as a nonprofit AI research lab with a mission to ensure artificial general intelligence benefits all of humanity.
ResNet - Microsoft Research introduced ResNet (Residual Networks), enabling much deeper neural networks and advancing computer vision.
2012
AlexNet and Deep Learning Revolution - Alex Krizhevsky's AlexNet won the ImageNet competition by a large margin, using deep convolutional neural networks and GPUs, sparking the modern deep learning revolution.
2011
IBM Watson Wins Jeopardy! - IBM's Watson defeated human champions in the quiz show Jeopardy!, demonstrating advanced natural language processing and knowledge retrieval.
2006
Geoffrey Hinton's Deep Learning Breakthrough - Geoffrey Hinton and colleagues published work on deep belief networks, reigniting interest in neural networks and launching the deep learning era.
1997
Deep Blue Defeats Kasparov - IBM's Deep Blue became the first computer system to defeat a reigning world chess champion (Garry Kasparov) under tournament conditions.
1980s
Neural Networks Resurgence - Backpropagation algorithm was rediscovered and popularized, enabling training of multi-layer neural networks.
1956
Dartmouth Conference - The Dartmouth Summer Research Project on Artificial Intelligence, organized by John McCarthy, Marvin Minsky, and others, coined the term "artificial intelligence" and established AI as an academic field.
1950
Turing Test Proposed - Alan Turing published "Computing Machinery and Intelligence," proposing what became known as the Turing Test as a criterion for machine intelligence.