Top 5 AI Gateways for Anthropic, OpenAI, and Gemini
AI gateways put Claude, GPT, and Gemini models behind one API with shared keys, fallbacks, and cost tracking. This guide compares Bifrost, LiteLLM, OpenRouter, Vercel AI Gateway, and Cloudflare AI Gateway on SDK compatibility and how prompt caching, tool use, and reasoning pass through.