Claude API

Access Anthropic's state-of-the-art Claude models (Opus, Sonnet, Haiku) via the RESTful Messages API, integrating advanced AI capabilities directly into your applications.

The Claude API is Anthropic's direct developer interface for integrating their powerful large language models (LLMs) like Claude 3.5 Sonnet and Opus into production applications. It utilizes a robust Messages API for all conversational and generative interactions, supporting a massive 200,000-token context window for deep document analysis and sustained, complex reasoning. Developers leverage its Constitutional AI framework for built-in safety and utilize key features like Tool Use (function calling) and the Message Batches API for cost-efficient, high-volume processing. This is the direct, pay-as-you-go route for full feature control and cutting-edge model access.

https://docs.anthropic.com/claude