Anthropic API

Basic Information

• Company/Brand: Anthropic
• Country/Region: USA (San Francisco)
• Official Website: https://console.anthropic.com / https://platform.claude.com
• Type: Claude LLM API / Developer Platform
• Founded: 2021 (API officially launched in 2023)

Product Description

The Anthropic API is the official developer platform for accessing the Claude series of AI models. Developers can build AI applications through direct API calls or the Agent SDK, with deployment options on AWS Bedrock, Google Cloud Vertex AI, or Microsoft Foundry. In March 2026, the web search tool and programmatic tool calls were officially GA (no longer requiring a beta header), and API code execution is free when paired with web search.

Core Features/Characteristics

• Three-tier Models:
• Claude Haiku 4.5: $1/$5 per million tokens (fastest)
• Claude Sonnet 4.6: $3/$15 (balanced)
• Claude Opus 4.6: $5/$25 (strongest)
• 1 Million Token Context: Supported in Beta
• Web Search Tool: GA in March 2026, built-in web search
• Programmatic Tool Calls: GA, supports function calls
• Free Code Execution: Free code execution when paired with web search/web fetch
• Agent SDK: Official agent development toolkit
• Extended Thinking: Supports deep reasoning with extended thinking
• Enterprise Analytics API: Programmatic access to organizational usage and engagement data
• Multi-cloud Deployment: AWS Bedrock, Vertex AI, Microsoft Foundry
• Sandbox Execution: Sandboxed code execution for enhanced security

Business Model

• Pay-as-you-go: Charged based on input/output token count
• Multi-model Pricing: Three tiers, priced from $1 to $25 per million tokens
• Multi-cloud Deployment: Purchased through cloud platform Marketplaces
• Enterprise Contracts: Custom solutions for large enterprises
• Free Tier: Initial free quota upon Console registration

Target Users

• AI application developers
• Teams building AI agents
• Enterprise-level AI integration projects
• Development tools requiring code generation and analysis
• Security-sensitive applications (Claude's safety alignment advantage)

Competitive Advantages

• Claude models excel in reasoning, code, and long-text capabilities
• Industry-leading 1 million token context length
• Agent SDK simplifies agent development
• Built-in web search and code execution reduce developer workload
• Leading safety and alignment in the industry
• Multi-cloud deployment flexibility (AWS/GCP/Azure)
• Competitive API pricing

Market Performance

• Claude API continues to grow in popularity within the developer community
• Integrated into numerous AI tools and platforms
• Rapid growth in enterprise customers
• Official tools like Claude Code drive API usage
• Direct competition with OpenAI API

Relationship with OpenClaw Ecosystem

The Anthropic API is one of the core LLM interfaces for OpenClaw. OpenClaw can directly call the Claude series models via the Anthropic API to power AI agents. Claude's long context, agent capabilities, and safety make it an ideal reasoning engine for OpenClaw agents. Anthropic's Agent SDK can also deeply integrate with OpenClaw's agent framework, providing more robust agent-building capabilities.