API
OpenAI API
OpenAI API provides programmatic access to OpenAI models through the Responses API, Realtime API, batch processing, and other model and media endpoints.
Research comparison
OpenAI API vs Claude API
OpenAI API and Claude API both provide model access, streaming, tool use, and official SDKs. They differ in API surface, model catalog, authentication details, and supported media and realtime endpoints.
Verified Oct 3, 202626 evidence sources
API
Claude API
Claude API is Anthropic's REST API for programmatic access to Claude models, including Messages, streaming, tool use, files, model listing, and related platform features.
Structured facts
Entity profiles
These fields come from each entity record and are kept separate from the curated comparison notes below.
OpenAI API
- Entity type
- API
- Status
- Active
- Verified
- Oct 3, 2026
- Styles
- Rest, Websocket, Sdk
- Authentication
- Bearer Token
- SDKs
- JavaScript, TypeScript, Python, C#, Java, Go, Ruby
- OpenAI compatible
- Yes
- Pricing
- Usage Based
Claude API
- Entity type
- API
- Status
- Active
- Verified
- Oct 3, 2026
- Styles
- Rest, Sdk
- Authentication
- Api Key
- SDKs
- Python, TypeScript, C#, Go, Java, PHP, Ruby
- OpenAI compatible
- No
- Pricing
- Usage Based
Editorial comparison
Key differences
These rows are curated comparison data, distinct from automatically aggregated graph relationships.
Primary generation surface
OpenAI API
Responses API, with additional model and media endpoints
Claude API
Messages API and related Claude Platform endpoints
Realtime API
OpenAI API
Dedicated Realtime API is available
Claude API
No equivalent general-purpose realtime voice surface represented in this record
Authentication
OpenAI API
Bearer credential
Claude API
API key
Official SDK languages listed here
OpenAI API
JavaScript/TypeScript, Python, C#, Java, Go, Ruby
Claude API
Python, TypeScript, C#, Go, Java, PHP, Ruby
Knowledge graph
Connected models and APIs
OpenAI API
APIs
No API links in the current graph.
Claude API
APIs
No API links in the current graph.