claudeai

Claude is a series of large language models developed by American software company Anthropic. Named after Claude Shannon, Claude was released as an AI-based chatbot in March 2023. It is also used in AI-assisted software development.
Claude is trained using "constitutional AI", a technique developed by Anthropic to improve ethical and legal compliance (AI alignment). Since Claude 3, each generation has typically been released in three sizes, from least to most capable: Haiku, Sonnet, and Opus. An additional model named Claude Mythos was released to a handful of companies in 2026.
US federal agencies started phasing out the use of Claude after Anthropic refused to remove contractual prohibitions on the use of Claude for mass domestic surveillance and fully-autonomous weapons. Following the refusal, the Department of Defense (DoD) designated the company a "supply chain risk" and barred all U.S. private military contractors, suppliers, and partners from doing business with the firm. On March 26, 2026, a federal judge issued a temporary injunction against the DoD's designation.

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