Helicone AI Gateway is an open-source platform that simplifies access to over 100 AI models from various providers like OpenAI, Anthropic, and Google through a single API key, eliminating the need for multiple integrations. It offers zero markup pricing and built-in observability, automatically logging and analyzing each request without extra configuration. The gateway intelligently routes requests, ensuring applications remain functional during provider outages or rate limits, while providing full transparency into costs and performance. Helicone's features include prompt management for easy updates, cost optimization through intelligent routing and model selection, and support for streaming responses to enhance user experience. It is designed for AI engineers, engineering teams, budget-conscious organizations, and compliance teams, offering reliability, cost-effectiveness, and detailed audit trails. By consolidating AI infrastructure management into a single interface, Helicone AI Gateway enables efficient development and operation of AI applications across multiple providers.