ToAPIs is an OpenAI compatible AI API gateway that provides unified access to over 200 AI models for text, image, and video generation. Its primary function is to offer a single API surface that supports models from providers including OpenAI, Anthropic, Google, ByteDance, Alibaba, and DeepSeek. The platform is designed for teams that require multi model coverage, provider failover, unified billing, and low friction migration from existing OpenAI SDK integrations. The gateway includes several key capabilities. It supports provider failover, allowing automatic switching when one endpoint degrades or rate limits. Users can implement default model routing and fallback model policies to manage workload distribution. The platform offers cost control features that enable routing workloads to the best model and price combination for each task class. ToAPIs also provides portability by allowing teams to keep one integration contract while switching providers underneath, avoiding vendor lock in. The system includes unified authentication and billing across text, image, and video model families. Typical use cases include teams migrating existing OpenAI SDK workloads with minimal code changes, products that need text, image, and video APIs under a single auth and billing model, and operations teams requiring routing, observability, and graceful provider failover. The workflow involves setting the base URL to https://toapis.com/v1, replacing the API key with a ToAPIs key, and mapping model names by capability tier with default fallbacks. Users can enable retries and timeout budgets for provider level transient failures. Common error handling includes 401 authentication errors requiring API key scope verification and 429 rate limit errors requiring exponential backoff and request shaping. Technical implementation requires minimal changes for teams already using the OpenAI SDK. Users keep their existing SDK and switch by changing the API endpoint and key. The platform supports model discovery through a market page, budget and routing decisions through a pricing page, and model specific implementation details through model guide pages. ToAPIs is best suited for teams that need one API contract across multiple model families and want to optimize for cost and quality after an initial migration.