OpenAI API vs Anthropic API
Detailed comparison to help you choose the right API for your project
Both APIs have verified data. Information has been manually fact-checked against official documentation and may be more accurate than automated data collection.
TL;DR Summary
Choose OpenAI if:
- You need 3+ official SDKs
- You prefer API Key authentication
- API key authentication with organization support
- You're in Openai industry
Choose Anthropic if:
- You need 4+ official SDKs
- You prefer API Key authentication
- API key authentication via x-api-key header
- You're in Ai Research industry
Feature Comparison
| Feature |  OpenAI |  Anthropic |
|---|---|---|
| General Information | ||
| Website | Available | Available |
| API Documentation | Available | Available |
| Founded | 2015 | 2021 |
| Headquarters | San Francisco, CA | San Francisco, CA |
| API Features | ||
| OpenAPI Specification | ||
| GraphQL Support | ||
| Webhooks | ||
| Sandbox/Test Mode | ||
| SDKs & Libraries | ||
| Total SDKs | 3 SDKs | 4 SDKs |
| JavaScript/Node.js | ||
| Python | ||
| Ruby | ||
| PHP | ||
| Java | ||
| .NET | ||
| Go | ||
| Authentication | ||
| Auth Methods | API Key | API Key |
| OAuth 2.0 | ||
| API Key | ||
| Developer Experience | ||
| GitHub Stars | - | - |
| Stack Overflow Questions | - | - |
| Changelog Available | ||
| Status Page | ||
| Integrations | ||
| Total Integrations | 0 integrations | 0 integrations |
| Zapier Integration | ||
Our Verdict
Both OpenAI and Anthropic are solid choices in their category. Your decision should be based on your specific requirements:
- For more SDK options: Anthropic offers 4 SDKs
- For more integrations: OpenAI has 0 integrations
- Authentication: OpenAI uses API Key, while Anthropic uses API Key
We recommend trying both APIs and consulting their official documentation to see which fits your workflow better.
Frequently Asked Questions
What is the main difference between OpenAI and Anthropic?
OpenAI focuses on Openai while Anthropicspecializes in Ai Research. Both offer robust APIs but may differ in specific features, pricing, and integration options.
Which API has better documentation?
Both OpenAI and Anthropic provide API documentation. OpenAI offers an OpenAPI specification. Anthropic offers an OpenAPI specification. We recommend reviewing both to see which style suits your team better.
Can I use both OpenAI and Anthropic together?
Yes, many developers use multiple APIs together depending on their needs. You might use OpenAI for some features and Anthropic for others, depending on which offers better support for specific use cases.