Styx is an open-source AI gateway. Send "model": "styx:auto" and it picks the optimal model based on prompt complexity. Simple question → cheap model. Complex code → frontier model.
65+ models from OpenAI, Anthropic, Google, Mistral. Self-hosted with Docker in 5 minutes. Interactive setup wizard. Dashboard for costs and latency. Auto-failover between providers.
Go router (<10ms overhead) + Python backend + Next.js dashboard. Apache 2.0.
