Rankings › Compare › OpenAI API vs Anthropic API
OpenAI API vs Anthropic API
| OpenAI API | Anthropic API | |
|---|---|---|
| Category & rank | #1 in AI APIs & models | #2 in AI APIs & models |
| Pricing | Pay per token; see site | Pay per token; see site |
| Free tier | Not listed | Not listed |
| Best for | Which model API should my app call? | Which model API should my app call? |
| Tags | api | api |
| Verdict | Broadest ecosystem and tooling. A safe first choice for most apps. | Claude models are top-tier for coding and agents. Strong pick for tool use. |
| Official site | Visit OpenAI API ↗ | Visit Anthropic API ↗ |
Pricing changes often; always check each official pricing page. Add a third tool →