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Claude

Anthropic · Founded 2021

Claude is Anthropic's flagship conversational AI assistant, marketed as the AI for problem solvers and built on Constitutional AI principles. It runs on the Opus, Sonnet, Haiku, Fable, and Mythos model families and is widely used for long-context reasoning, writing, agentic coding, and enterprise document analysis. Anthropic, the parent company, is a San Francisco public benefit corporation that closed a $65B Series H in May 2026 at a $965B valuation.

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Directory profile ·

Claude

What Claude is

Claude is Anthropic's flagship conversational AI assistant, marketed as the AI for problem solvers and built on Constitutional AI principles. It runs on the Opus, Sonnet, Haiku, Fable, and Mythos model families and is widely used for long-context reasoning, writing, agentic coding, and enterprise document analysis. Anthropic, the parent company, is a San Francisco public benefit corporation that closed a $65B Series H in May 2026 at a $965B valuation.

Funding snapshot

$65B Series H at a $965B post-money valuation (May 28, 2026), led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital; co-led by Capital Group, Coatue, D1 Capital, GIC, ICONIQ, and XN; additional investors include Blackstone, Brookfield, D.E. Shaw Ventures, DST Global, Fidelity, General Catalyst, Insight Partners, Jane Street, Lightspeed, MGX, NTTVC, and Temasek; run-rate revenue crossed $47B. Source: Anthropic's own Series H announcement (anthropic.com/news/series-h).

Key features

  • 1M-token context window on the current Claude Fable 5.1, Opus 5, and Sonnet 5 models (Haiku 4.5 remains at 200K), each with 128K max output except Haiku's 64K
  • Current lineup (newest first): Claude Fable 5.1 (announced 1 Sept 2026; generally available; demanding reasoning and long-horizon agentic work), Claude Mythos 5.1 (announced 1 Sept 2026; limited to trusted-access programs), Claude Opus 5 (complex agentic coding), Claude Sonnet 5 (speed and intelligence), Claude Haiku 4.5 (fastest, near-frontier)
  • Claude Code agentic developer tool with command-line and web interfaces
  • Claude Cowork for delegated multi-step workflows with sandboxed local file access
  • Computer Use to control applications by simulating keyboard and mouse input
  • Claude in Chrome, Claude for Slack, Claude for Microsoft 365, and Claude Design/Science
  • Multimodal vision input with multilingual text generation and tool use

Where it lives

AWS BedrockGoogle Cloud Vertex AIMicrosoft FoundryMicrosoft 365SlackChrome browser extensionREST API and Anthropic Messages APIZapier and connectors via claude.ai

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Sources & media

Tags

#chatbot#reasoning#long-context#coding#assistant#agentic#anthropic
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