AI Gateway

An LLM router decides which provider and model serve each request. This guide shows how Bifrost routes between OpenAI, Anthropic, and Gemini behind one OpenAI-compatible endpoint, with CEL routing rules, fallbacks, key load balancing, and budget-aware routing.

TensorZero is an open-source LLMOps stack built around a Rust LLM gateway, and its site now says it is no longer maintained. This guide compares five replacements, including Bifrost, LiteLLM, Kong AI Gateway, and Cloudflare AI Gateway, on routing, governance, MCP, and deployment.

SSE streaming delivers an LLM response as server-sent events over one open HTTP connection, token by token. This guide compares Bifrost, Kong AI Gateway, LiteLLM, Cloudflare AI Gateway, and OpenRouter on stream normalization, failover, guardrails, and logging.

An LLM gateway with high-availability clustering runs as several nodes that share rate limits, budgets, and config, so no single process outage stops AI traffic. This guide compares Bifrost, Kong AI Gateway, LiteLLM, Envoy AI Gateway, and Cloudflare AI Gateway on how they stay up.

AI spend management assigns, enforces, and attributes LLM costs to the teams and customers that incur them. This guide compares Bifrost, Kong AI Gateway, Cloudflare AI Gateway, Azure API Management, and Google Apigee on budget hierarchy, rate limits, and chargeback data.

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.