Integrate and scale using our API and SDKs. ... Craft and test powerful prompts directly in your browser. ... Learn about changes and new features in the Claude Developer Platform. ... Get started with Claude Code. ... Consult the Claude Code reference documentation for details on feature implementation and configuration.

Run Python code, create visualizations, and analyze data directly within API calls. ... Get detailed references to the exact sentences and passages Claude uses to generate responses, leading to more verifiable, trustworthy outputs. ... Upload documents once and reference them repeatedly across ...

Get started with Claude Code with npm install -g @anthropic-ai/claude-code · View the Anthropic Cookbook for code snippets and guides for common workflows · Quickly get started with building applications by using the Anthropic Quickstarts repo · Review the full API documentation for all features and products

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Integrate and scale using our API and SDKs. ... Craft and test powerful prompts directly in your browser. ... Learn about changes and new features in the Claude Developer Platform. ... Get started with Claude Code. ... Consult the Claude Code reference documentation for details on feature implementation and configuration.

5 days ago - Claude Opus 4.5 is state-of-the-art on tests of real-world software engineering: Opus 4.5 is available today on our apps, our API, and on all three major cloud platforms. If you’re a developer, simply use claude-opus-4-5-20251101 via the Claude API.

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1 day ago - For individual users, Claude is free to try at modest usage levels, with paid tiers for power users. For business usage, there are Team and Enterprise plans with collaboration tools and centralized billing. Separately, developers pay usage-based API fees per token. This report examines the full details of these offerings as of late 2025, drawing on official Anthropic documentation, news reports, and independent analyses.

Models overviewChoosing a modelWhat's new in Claude 4.5Migrating to Claude 4.5Model deprecationsPricing ... Prompt cachingContext editingExtended thinkingEffortStreaming MessagesBatch processingCitationsMultilingual supportToken countingEmbeddingsVisionPDF supportFiles APISearch resultsStructured ...

5 days ago - For developers and businesses, Claude Sonnet 4.5 is available via the Anthropic API. According to Anthropic’s official pricing documentation:

September 29, 2025 - Pricing for Sonnet 4.5 starts at $3 per million input tokens and $15 per million output tokens, with up to 90% cost savings with prompt caching and 50% cost savings with batch processing. To learn more, check out our pricing page. To get started, simply use claude-sonnet-4-5 via the Claude API.

4 days ago - This topic shows how to use the Anthropic Claude messages API with the base inference operations (InvokeModel or InvokeModelWithResponseStream). However, we recommend that you use the Converse API to implement messages in your application. The Converse API provides a unified set of parameters that work across all models that support messages.

API reference for Versions endpoints

Build with the Claude API

Claude API Documentation · Claude Cookbooks - A collection of code snippets and guides for common tasks · Claude API Fundamentals Course · We welcome contributions to the Claude Quickstarts repository! If you have ideas for new quickstart projects or improvements to existing ones, please open an issue or submit a pull request.

export ANTHROPIC_BASE_URL=https://api.deepseek.com/anthropic export ANTHROPIC_AUTH_TOKEN=${YOUR_API_KEY} export API_TIMEOUT_MS=600000 export ANTHROPIC_MODEL=deepseek-chat export ANTHROPIC_SMALL_FAST_MODEL=deepseek-chat export CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1

October 16, 2025 - Agent Skills, which we often refer to simply as Skills, can now be added to Messages API requests and the new /v1/skills endpoint gives developers programmatic control over custom skill versioning and management. Skills require the Code Execution Tool beta, which provides the secure environment they need to run. Use Anthropic-created skills to have Claude read and generate professional Excel spreadsheets with formulas, PowerPoint presentations, Word documents, and fillable PDFs.

Learn how to get started with the Claude Developer Platform and Claude Code. ... Make your first API call in minutes.