All Comparisons
Model APIs
OpenAI API vs Anthropic API
Choosing between the OpenAI and Anthropic APIs for production. Compared across SDKs, tool use, streaming, and developer ergonomics.
Feature
OpenAI API
Anthropic API
Official TypeScript SDK
Official Python SDK
Streaming responses
Tool / function calling
Vision input
Prompt caching
Image generation endpoint
Batch API
Long context (200K+)
OpenAI-compatible schema
Supported Partial Not supported
Verdict
OpenAI's API has the broadest feature surface, including native image generation. Anthropic's API is strong on long context and reliable tool use. Many teams route both behind one abstraction and pick per task.