Bifrost

Bifrost is an open-source AI gateway and server. It unifies access to over 20 providers, including OpenAI, Anthropic, AWS Bedrock, Google Vertex, Azure, Cerebras, Cohere, Mistral, Ollama, and Groq, through a single OpenAI-compatible API. The software is deployed as a server via Docker or NPX, or integrated directly into Go applications using its native SDK.

The gateway acts as a proxy between AI applications and various large language model providers. It allows developers to replace existing API endpoints with a single URL to manage multiple models and providers without changing application code. It includes a built-in web interface for visual configuration, real-time monitoring, and analytics, enabling a transition from local setup to production in under a minute.

Key features

• Unified OpenAI-compatible API for multiple providers
• Automatic failover and load balancing across API keys
• Model Context Protocol (MCP) for external tool integration
• Semantic caching based on response similarity
• Hierarchical budget management and usage tracking
• OIDC and OAuth 2.0 user provisioning
• Native Prometheus metrics and distributed tracing
• Support for multimodal inputs including text, images, and audio
• Extensible middleware architecture for custom plugins

Bifrost is built with a modular architecture in Go, featuring separate components for provider implementations, configuration stores, and transport layers. It is designed for teams requiring high-throughput LLM operations, offering features like clustering and secrets management for production environments. The system supports a wide range of SDK integrations, including Langchain and LiteLLM, and allows for drop-in replacements of OpenAI, Anthropic, and Google GenAI APIs. The architecture includes a dedicated framework for data persistence, utilizing config stores, log stores, and vector stores to manage the flow of AI requests.

This tool serves as a governance and observability layer for generative AI infrastructure, focusing on reliability, cost control, and the reduction of provider lock-in.