Route Faster.
Scale Smarter.
Build Better AI Apps.
FastRouter helps enterprise AI teams route, compare, and operate across 100+ models with a single OpenAI compatible API – so every request gets the best quality, cost, and reliability.
Enterprise-ready access to the world's leading AI models
Access Gemini 3 Pro, GPT-5.2, Grok 4, Veo 3, Nano Banana, Claude 4.6 Opus, and other top models from a single API. FastRouter provides intelligent routing, automatic failover, and built-in governance.
The Fastest Gateway For Every Model
Instant access to every top model using one API.
- OpenAI-compatible API for different providers
- Text, image, video, embeddings, and speech
- Add or swap models without code changes
Intelligent Cost Optimization
Reduce AI spend with intelligent routing, batching, and model controls.
- Smart routing to cost-efficient models
- Prevent unnecessary premium model usage
- Batch processing for high-volume workloads
Cost Control & Governance
Full control without slowing teams down.
- Project and API key limits.
- Member roles and access controls.
- Prevent spend shocks and bill spikes.
Better Uptime & Reliability
Resilience built in, not bolted on.
- Automatic retries across providers.
- Fallback models when failures occur.
- Virtual model lists for seamless failover.
Consolidated Dashboards & Alerts
Complete visibility across every model, provider, and project.
- Unified dashboards across models and providers.
- Powerful filters for cost, latency, and errors.
- Alerts for usage and spikes.
Always the Right Model, Automatically
Route every request to the best LLM based on cost, latency, and output quality. No manual tuning needed.
Cost Optimized
Choose models that deliver the highest accuracy and relevance for the request using our Auto Router.
Low Latency
Select the quickest model available to keep experiences smooth and responsive.
High Throughput
Prioritize models that handle high request volumes at scale.
Always-On Reliability
Keep AI applications running with automatic failover, multi-provider redundancy, and intelligent traffic routing.
Instant Failover
Automatically reroute requests to other healthy providers for your chosen models.
Higher Rate Limits
Access aggregated capacity across providers to support higher request volumes.
Fallback Lists
Define prioritized fallback models and lists so requests seamlessly continue.
Compare & Combine Models
Make informed model choices and improve results through side-by-side evaluation and multi-model collaboration.
Data Driven Decisions
Compare latency, output quality, and cost across models in interactive playgrounds.
Stronger Reasoning
Combine multiple models to cross-check outputs, and reduce errors.
Better Response Quality
Use the strengths of each model to deliver consistently better results.
Full Visibility Across AI Workloads
Track usage, latency, errors, and costs across all models with real-time metrics and detailed logs.
Unified Metrics
Monitor performance, latency, and error rates across models and providers.
Activity Log
Gain clear visibility into usage and performance for each request.
Ongoing Evaluations
Monitor model outputs to ensure consistent quality and performance.
Solutions Built for Every Role in Your Organization
Unify AI model access across your organization with enterprise-grade routing, governance, and failover - without vendor lock-in.
Developers
Drop-in OpenAI-compatible APIs with fast routing and built-in failover.
Engineering Leaders
Control costs without compromising reliability or scale.
Product Teams
Gain actionable insights to power faster, smarter AI product development.
Get Millions Of Tokens To Start. Free Credits On Us.
No set up fees. No monthly minimums. No credit card required. Build, test and explore FastRouter's unified API with free credits.
Whatever Your Goals,
We've Got You Covered
Make the most of top models based on what matters to your team.
Evaluations
Evaluate outputs across models to ensure quality, consistency, and performance in production.
Guardrails
Validate and monitor inputs and outputs to enforce safety, compliance, and consistency.
Alerts
Receive real-time alerts for performance issues, errors, and spend anomalies across AI workloads.
Virtual Model Lists
Mix providers and models into a unified model alias with policy-driven selection.
Supported models
One API. Every Model.
Production Ready.
Unified access, intelligent routing, and built-in observability through a single high-performance gateway.
Loved by teams,
trusted by leaders
FastRouter is forged from the insights of high-performance engineering organizations. Unrelenting speed, automated workflows, and a commitment to the quality of your craft.
Vineet Kumar
Head of Technology - CX at Verticurl
FastRouter is a good value add, specifically when you are not sure which LLM is better for your use cases. You can play around with models, can compare against them, and then use normal OpenAI compatible APIs call to leverage the full potential of it.
Dr. Rishabh Bhandari
Founder, Medisha
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.
Sainath Gupta
Founder, Knit Finance
Amazing product. Have had a great experience using FastRouter. Reliable access to models across providers helps removes the worry about outages or vendor lock-in.
Vineet Kumar
Head of Technology - CX at Verticurl
FastRouter is a good value add, specifically when you are not sure which LLM is better for your use cases. You can play around with models, can compare against them, and then use normal OpenAI compatible APIs call to leverage the full potential of it.
Dr. Rishabh Bhandari
Founder, Medisha
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.
Sainath Gupta
Founder, Knit Finance
Amazing product. Have had a great experience using FastRouter. Reliable access to models across providers helps removes the worry about outages or vendor lock-in.
Vineet Kumar
Head of Technology - CX at Verticurl
FastRouter is a good value add, specifically when you are not sure which LLM is better for your use cases. You can play around with models, can compare against them, and then use normal OpenAI compatible APIs call to leverage the full potential of it.
Dr. Rishabh Bhandari
Founder, Medisha
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.
Sainath Gupta
Founder, Knit Finance
Amazing product. Have had a great experience using FastRouter. Reliable access to models across providers helps removes the worry about outages or vendor lock-in.