Anthropic Claude API
Direct API access to Claude — build AI applications with the most capable models for coding, analysis, writing, and reasoning.
Direct API access to Claude — build AI applications with the most capable models for coding, analysis, writing, and reasoning.
The Anthropic Claude API gives developers direct access to Claude’s full capabilities for building production AI applications. Fine-grained control over model selection, context, and system prompts enables custom AI applications, data pipelines, and enterprise integrations.
Pricing: Claude Haiku 3.5 from $0.80/million input tokens. Claude Sonnet 4.6 at $3/million. Claude Opus 4.6 at $15/million. No monthly minimum.
Key API features: 200,000 token context window (Opus), function calling and tool use, streaming responses, document analysis (PDFs and images), the Messages API for multi-turn conversations, and the Batches API for high-volume async processing at 50% discount.
Particularly valued for: legal document analysis, complex reasoning tasks, long-document summarisation, code generation and review, and applications requiring careful, nuanced text generation.
Pros: Strongest reasoning and writing quality, 200K context window, multiple model tiers for cost optimisation, tool use API, transparent pricing, strong data privacy commitments.
Cons: Requires developer setup, no free tier, rate limits on lower tiers, premium model expensive at scale.
Best for: Developers building production AI applications, enterprises integrating AI into workflows, and data teams processing large documents.