Anthropic logo, creators of Claude

Claude: Constitutional AI

Product LaunchesGenerative AI Revolution
Impact

What Happened

Anthropic released Claude, an AI assistant built with Constitutional AI (CAI) — a novel approach where the model is trained to follow a set of principles rather than just optimizing for human preference ratings. Anthropic, founded by former OpenAI researchers, positioned Claude as the safety-focused alternative.

Why It Mattered

Established Anthropic as a major AI lab and introduced a new paradigm for AI alignment. Constitutional AI showed there were alternatives to pure RLHF for making models safe and helpful. Claude became a leading AI assistant.

Key People

Organizations

Tags

Part of the Generative AI Revolution (2022–2024) era · Browse all product launches · View all 2023 milestones

Related Milestones

Anthropic logo, creators of Claude 3
Product

Claude 3: Approaching Human-Level

Anthropic launched the Claude 3 family (Haiku, Sonnet, Opus), with Claude 3 Opus matching or exceeding GPT-4 on most benchmarks. It featured a 200K token context window, strong reasoning, nuanced instruction-following, and a 'personality' that users found distinctively thoughtful and careful.

Anthropic
Anthropic logo
Product

Claude 3.5 Sonnet: A Leading Coding Model

Anthropic's Claude 3.5 Sonnet emerged as one of the strongest widely used models for coding tasks, with developers praising its code generation, debugging, and software engineering capabilities. It powered tools like Claude Code, enabling AI to work directly inside developer environments.

Anthropic
Anthropic logo, creators of Claude 4
Product

Claude 4 / Opus 4: Frontier Reasoning

Anthropic released Claude 4 Opus, a model with significantly enhanced reasoning, extended thinking capabilities, and the ability to sustain complex multi-step problem-solving over long contexts. It excelled at agentic tasks, code generation, and nuanced analysis.

Anthropic
Anthropic AI safety company logo
Infrastructure

Anthropic Founded

Former OpenAI VP of Research Dario Amodei and his sister Daniela, along with several other OpenAI researchers, founded Anthropic — an AI safety company focused on building reliable, interpretable, and steerable AI systems.

Dario AmodeiDaniela AmodeiAnthropic
Anthropic logo, creators of Claude 4.5 Opus
Product

Claude 4.5 / 4.6 Opus: Frontier Agentic Capability

Anthropic released Claude 4.5 and 4.6 Opus, representing the frontier of AI capability in early 2026. These models demonstrated unprecedented reasoning depth, coding ability, and capacity for autonomous multi-step work. They could sustain complex agentic workflows, manage entire projects, and collaborate with other AI agents.

Anthropic

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