Key Capabilities
- OpenAI-compatible — Drop-in replacement for the OpenAI SDK, no other code changes needed
- Best-in-class reasoning — Highest accuracy on complex multi-step problems
- Advanced coding — Expert at large-scale code generation, debugging, and architecture design
- Long context — Supports large document processing and multi-turn conversations
- Streaming — Real-time token streaming via SSE
- Research-grade — Ideal for tasks requiring maximum intelligence and thoroughness
Quick Example
Parameters
API Reference
View the interactive API Playground for Claude Opus 4.1.

