Best AI API Platforms (2026)

Unified API platforms and SDKs that simplify integrating multiple LLM providers into applications with consistent interfaces and tooling.

#1OpenRouter

mac, windows, linux

Free

Unified API for 200+ models
OpenAI-compatible API
Automatic fallbacks

#2Vercel AI SDK

mac, windows, linux

Free

Unified LLM API
Streaming support
React/Next.js hooks

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