anthropic.com
Advanced AI assistant API with Claude models for safe, helpful, and harmless conversational AI applications.
Anthropic's Claude API provides access to the Claude 4 family of large language models — Claude Opus 4.8 for the hardest reasoning, Claude Sonnet 4.6 as the everyday workhorse, and the fast, low-cost Claude Haiku 4.5 — all designed with a focus on safety, accuracy, and helpfulness. Claude models excel at complex reasoning, analysis, agentic coding, and creative tasks while maintaining strong guardrails.
The API supports extended context windows up to 1M tokens, enabling analysis of entire codebases, books, or lengthy documents in a single request. Claude offers superior performance on tasks requiring nuanced understanding, following complex instructions, and maintaining context over long conversations.
With structured output, vision, tool use, native Model Context Protocol (MCP) support, and the Claude Agent SDK, the Claude API enables developers to build sophisticated agents and applications including customer support bots, research assistants, content tools, and code analysis systems. Prompt caching and batch processing keep costs low at scale.
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