Best AI & LLM APIs for Developers
Large language models and AI APIs for building intelligent applications. Compare features, pricing, and find the right tool for your project.
Quick Comparison
| Tool | Best For | Free Tier | Starting Price | |
|---|---|---|---|---|
| OpenAI API GPT-4 and the most popular LLM API | Most AI applications | Yes | Free | Try It |
| Anthropic Claude Safe, helpful AI assistant | Long document analysis | No | $0.008/1K tokens | Try It |
| Groq Fastest inference for open models | Real-time applications | Yes | Free | Try It |
| Mistral AI Efficient open-weight models | Cost-effective AI | Yes | Free | Try It |
All AI & LLM APIs Tools
OpenAI API
GPT-4 and the most popular LLM API
OpenAI is the default choice for most AI applications. GPT-4 remains the most capable model, but alternatives are catching up.
Anthropic Claude
Safe, helpful AI assistant
Claude is the best choice for tasks requiring long context or nuanced understanding. The 200K context window is unmatched.
Groq
Fastest inference for open models
Groq is the fastest LLM inference available. Perfect when latency matters and you're okay with open-source models.
Mistral AI
Efficient open-weight models
Mistral offers the best balance of cost and capability. Great for teams wanting open models or European data residency.
Head-to-Head Comparisons
Guides for AI & LLM APIs
Decision tools
Model costs and tradeoffs before you commit.