Topic page

Model API Platforms

A topic page for model APIs, inference platforms, and multi-model routing services used by product and engineering teams.

Platform leader

OpenAI API

OpenAI

OpenAI API is a model API platform product from OpenAI, focused on platform leader workflows and official access.

Closed Source / PlatformUsage-based / PlatformAPI

Model APIAPIFoundation Model

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Claude API

Anthropic API

Anthropic

Anthropic API is a model API platform product from Anthropic, focused on claude api workflows and official access.

Closed Source / PlatformUsage-based / PlatformAPI

Model APIAPIFoundation Model

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Model router

OpenRouter

The unified interface for LLMs.

Closed Source / PlatformUsage-based / PlatformAPI

Model APIAPIModel Routing

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China platform

SiliconFlow

硅基流动（SiliconFlow）专注于提供高效能、低成本的多品类 AI 模型服务，助力开发者和企业聚焦产品创新。

Closed Source / PlatformUsage-based / PlatformAPI

Model APIAPIFoundation model

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API platform topics serve users with concrete integration, procurement, or replacement needs, so pricing, model coverage, rate limits, and console UX should come first.

This topic can further compare OpenAI API alternatives, domestic API aggregators, and multi-model routing platforms.