**Claude is an AI assistant built by Anthropic, a company founded in 2021 by former OpenAI researchers.**
Anthropic's mission centers on developing safe, reliable, and beneficial artificial intelligence, with safety research treated as a core part of product development rather than an afterthought.
**Anthropic offers several Claude models tailored to different needs.**
Claude Opus 5 handles the most complex reasoning tasks, Claude Sonnet 5 balances performance and speed for everyday use, and Claude Haiku 4.5 is built for quick, lightweight responses. A newer Mythos tier sits above Opus for advanced use cases.
**Claude is available across many platforms.**
Users can access it through the claude.ai website, mobile and desktop apps, the Anthropic API, and specialized tools like Claude Code for developers and Claude Cowork for general knowledge work.
**Safety remains central to how Anthropic builds its products.**
The company invests heavily in alignment research, interpretability, and responsible scaling policies, aiming to ensure AI systems remain helpful, honest, and harmless as they grow more capable.