FastRouter

FastRouter is an API finder tool. FastRouter routes requests across 200+ models through one OpenAI compatible API, with auto routing, failover, cost controls and weekly savings insights.

FastRouter is a unified API gateway that gives engineering teams a single OpenAI compatible endpoint for more than 200 AI models, spanning text, image, video, embeddings, and speech. Instead of holding separate contracts and keys for each provider, a team points its existing SDK at FastRouter's base URL and selects a model ID. Adding or swapping a model later does not require code changes, which removes much of the integration work that normally follows every new model release. Behind that endpoint sits routing logic. The Auto Router picks a model per request based on cost, latency, or throughput priorities, and virtual model lists group several providers under one alias so fallbacks happen automatically when a provider struggles. Automatic retries and multi-provider redundancy keep applications running through outages. On the money side, project and API key limits, member roles, and spend alerts give engineering leaders a way to cap exposure before a traffic spike turns into a bill shock. The Insights feature reviews traffic that is already routed and returns a ranked list of changes, each backed by sampled requests, savings math, and a link to the screen where the change is made. A playground and model council support side-by-side comparison of latency, quality, and cost, and can combine outputs from several models for cross-checking. Dashboards, activity logs, evaluations, and guardrails round out the observability layer. FastRouter is built for enterprise AI teams: developers who want drop-in compatibility, engineering leaders who own the budget, and product teams that need evidence before committing to a model. It competes less with any single model vendor and more with the glue layer teams assemble themselves. For organizations that need prompts and logs to stay inside their own network, a self-hosted gateway is offered on the Enterprise plan. Smaller teams get free starting credits and pay the providers' list price with no markup, so the decision comes down to whether centralized routing and governance are worth adopting.