Claude API vs OpenAI API
Claude API Anthropic
Claude models for developers, with tool use, prompt caching, batches and skills; also on AWS, Google Cloud and Azure.
VisitOpenAI API OpenAI
GPT models for text, vision, images, audio and realtime voice, plus the Agents SDK.
VisitSide by side
| Property | Claude API | OpenAI API |
|---|---|---|
| Type | Product | Product |
| Category | AI models and APIs | AI models and APIs |
| Made by | Anthropic | OpenAI |
| Pricing | Pay per use | Pay per use |
| Open source | No | No |
| API | Yes | Yes |
| Platforms | API | API |
| Startup | Yes | Yes |
Features
Only Claude API
- coding
- skills
- mcp
Both
- llm api
- reasoning
- agents
Only OpenAI API
- image generation
- voice
- embeddings