Key Capabilities
- OpenAI-compatible — Drop-in replacement for the OpenAI SDK, no other code changes needed
- Extended Thinking — Step-by-step internal reasoning enabled by default
- Fast and affordable — Thinking capability at Haiku-level speed and cost
- Streaming — Real-time token streaming via SSE
- Strong reasoning — Higher accuracy on math, logic, and multi-step problems
Quick Example
Parameters
API Reference
View the interactive API Playground for Claude Haiku 4.5 Thinking.

