GoModel

AI gateway written in Go. Lightweight unified OpenAI-compatible API for OpenAI, Anthropic, Gemini, Groq, xAI & Ollama. LiteLLM alternative with observability, guardrails, streaming, costs and usage tracking. Maintained by ENTERPILOT on GitHub, where it has earned 995 stars from the community.

It's actively developed around ai, ai-gateway, ai-proxy, and is a solid reference for anyone building with these tools.