Model Routing
Send each request to the best available model based on cost, latency, throughput, or quality priorities through a single OpenAI-compatible endpoint.
FastRouter helps engineering and product teams route every LLM request to the right model across providers through one OpenAI-compatible API. Build multi-model applications with intelligent routing, automatic failover, observability, governance, evaluations, and cost controls—without hard-coding providers, managing brittle integrations, or sacrificing production reliability as models and workloads change.
FastRouter unifies routing, reliability, observability, governance, evaluations, and cost control for production multi-model AI applications.
Send each request to the best available model based on cost, latency, throughput, or quality priorities through a single OpenAI-compatible endpoint.
Create stable model aliases backed by prioritized provider and model lists, allowing centralized swaps, failover, and policy-driven selection without application code changes.
Keep applications running through outages, rate limits, and model failures by automatically retrying and rerouting requests to healthy fallback providers.
Monitor latency, usage, cost, errors, and request logs across every model and provider from one unified operational dashboard.
Set project and API-key spend limits, manage roles, control model access, and prevent ungoverned LLM usage across teams.
Compare model outputs with structured evaluations to validate quality, detect drift, and choose the right model for each workload.
FastRouter turns model routing into a central platform capability instead of scattered application logic. Route every request through one OpenAI-compatible endpoint, optimize for cost or latency, fail over when providers degrade, and enforce governance across teams. With observability, evaluations, guardrails, and billing in one control plane, production AI becomes easier to operate, scale, and improve.
See how production AI teams can improve uptime, visibility, model selection, and cost control through one gateway.
"Excellent platform to test the latest LLMs for our use case. With new LLMs coming out every few weeks and benchmarks not giving the full picture, I rely on Fastrouter.ai to optimize my cost vs quality balance."
FastRouter gives teams the control plane needed to operate multi-model AI reliably.
Route across 100+ models without rebuilding provider-specific integrations or locking apps to one vendor.
Automatic fallback and redundancy keep production AI available through outages, failures, and rate limits.
Unified dashboards show cost, latency, errors, logs, and usage across every provider.
Gateway-level limits, roles, access controls, and guardrails keep AI usage accountable at scale.
A platform team focused on production-ready AI operations.
FastRouter is built for teams moving beyond single-model prototypes into production AI systems that depend on many providers, modalities, and workloads. Instead of treating routing, observability, experiments, guardrails, billing, and governance as separate tools, FastRouter brings them into one OpenAI-compatible control plane. The platform’s vision is to help engineering, product, platform, and finance teams operate AI with the same discipline they expect from modern infrastructure: resilient routing, measurable performance, clear ownership, and predictable spend. By abstracting provider complexity behind one API, FastRouter lets teams adopt new models quickly while keeping production systems stable, observable, and governed.
An LLM routing platform sits between your application and multiple AI providers, deciding which model should handle each request. FastRouter routes across 100+ models using strategies such as cost optimization, low latency, high throughput, fallback lists, and virtual model aliases. This helps teams avoid hard-coded model choices while improving reliability, cost control, and operational flexibility.
Get practical guidance on routing, governance, costs, and production rollout.
Works with existing OpenAI SDK-based integrations.
Supports resilient routing across major AI providers.
Gateway-level controls for safer production AI operations.
Tell us about your models, providers, and production requirements. We’ll help you evaluate routing, reliability, cost controls, and rollout options using FastRouter’s unified API.
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