# LLM Gateways & APIs

> The connectivity layer between applications and models. Hosted APIs like the OpenAI, Anthropic, and Gemini APIs give direct access to frontier models; LLM gateways and proxies like OpenRouter, LiteLLM, and PortKey add multi-provider routing, caching, cost control, and fallbacks on top. Pick a gateway when you want one bill and easy model switching; go direct when you need day-one access to provider features.

14 tools in 2 subcategories. Web page: https://ailandscape.org/category/llm-gateways-apis · Each tool also has a markdown version at /tool/{slug}.md

## Hosted Model APIs

- [Anthropic API](https://ailandscape.org/tool/anthropic-api): APIs for Claude language models
- [Cerebras Inference](https://ailandscape.org/tool/cerebras-inference): Ultra-fast LLM inference API powered by Cerebras hardware
- [Google Gemini API](https://ailandscape.org/tool/google-gemini-api): Direct API access to Gemini models via AI Studio
- [GroqCloud](https://ailandscape.org/tool/groqcloud): Ultra-low-latency LPU inference API for open models
- [Mistral API](https://ailandscape.org/tool/mistral-api): La Plateforme — API access to Mistral models
- [OpenAI API](https://ailandscape.org/tool/openai-api): APIs for GPT models, DALL-E, and Whisper
- [Replicate](https://ailandscape.org/tool/replicate): Run open-source ML models via API
- [Together AI](https://ailandscape.org/tool/together-ai): Cloud platform for running open-source models

## AI Gateway & Proxy

- [Cloudflare AI Gateway](https://ailandscape.org/tool/cloudflare-ai-gateway): Caching, rate limiting, retries, and fallback across AI providers
- [LiteLLM](https://ailandscape.org/tool/litellm): Unified API gateway for 100+ LLM providers
- [Martian](https://ailandscape.org/tool/martian): Intelligent LLM router for cost and performance optimization
- [OpenRouter](https://ailandscape.org/tool/openrouter): Unified interface for frontier AI models
- [PortKey](https://ailandscape.org/tool/portkey): AI gateway with observability and fallback routing
- [Vercel AI Gateway](https://ailandscape.org/tool/vercel-ai-gateway): Gateway to access hundreds of models with zero token markup, including BYOK

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Part of [AI Landscape](https://ailandscape.org), an open map of the AI ecosystem. Index for AI assistants: https://ailandscape.org/llms.txt