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October 24, 2025

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Overview

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FastRouter is the fastest LLM gateway built for developers who need performance, visibility, and scale.

It connects 100+ models — GPT, Claude, Gemini, Grok, Mistral, and more — through a single API that’s designed to route requests intelligently and instantly.

⚡ Speed:
FastRouter adds under 10 ms overhead on average. Its adaptive routing engine benchmarks models in real time and automatically selects the fastest, healthiest endpoint — no manual switching, no downtime.

🎙️ Multimodality:
One API handles everything — text, image, audio, and video. No SDK juggling, no code rewrites. FastRouter turns complex multimodal workflows into a single, unified interface.

📊 Observability:
Full visibility into every request, token, and dollar. Track usage by project, team, or key. Set budgets, rate limits, and permissions directly in the dashboard — finally, AI infrastructure you can actually monitor.

Built for cost efficiency and control, FastRouter scales effortlessly from startup prototypes to enterprise workloads processing millions of requests per second.

One API. 100+ models. The fastest route to smarter AI.

Key Features

Automatic Model Selection
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Dynamic Tags Per Request
Provisioning Keys
Structured Outputs
Function Calling

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Initial release

October 24, 2025

Janvi Kaur Panesar

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Initial release of FastRouter.

Janvi Kaur Panesar

@janvi-kaur-panesar

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Pros and Cons

Pros

Unified API gateway

Automatic model selection

Optimizes usage and cost

High-volume handling

Real-time usage tracking

Usage limitation by project/team

Automated cost-effective routing

Real-time insights on usage

Infrastructure for outages handling

Minimal code changes

Optimized for scalability

Real-time governance system

Unified API for text, image, audio models

Dynamic Smart Routing system

Cost efficiency emphasis

Budgeting and rate limit controls

Real-time tokens and requests monitoring

Intelligent failover infrastructure

Across providers instant model access

Single API auto-routing feature

No QPS limits

Model permission per API

Performance optimization focus

Cost monitoring and regulation

No SDKs or code refactoring

No credit card required

Free trial available

Flexible scalability from startup to enterprise

Built-in enterprise-grade security

Instant benefits with minimal changes

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Cons

Model selection not customizable

No offline functionality

Lacks detailed analytics

No multi-language support

Dependent on external endpoints

No dedicated security features

Limited customizability in routing

Lacks manual failover control

No open-source for scrutiny

View 4 more cons

Q&A

What is FastRouter.ai?

FastRouter.ai is a unified API gateway for various AI language models. It primarily enables the integration of top AI language models via a single API, offering swift and reliable access across different providers.

What functions does FastRouter.ai serve?

FastRouter.ai serves as a gateway for integrating various top AI language models, automatically selects the most suitable language model for each task, optimizes usage, reduces costs, and handles high volume queries. It provides mechanisms for cost control and governance as well as real-time insights into usage patterns. It also guarantees uninterrupted service by means of an intelligent failover infrastructure.

Which AI language models does FastRouter.ai support?

FastRouter.ai supports numerous top models, including GPT-5, Veo 3, Grok 4, GPT Image 1, Claude 4 Opus, Gemini 2.5 Pro, and others.

How does FastRouter.ai select the most suitable language model for each task?

FastRouter.ai is designed to automatically select the most suitable language model for each task based on various factors such as cost, latency, and output quality.

What are the factors considered by FastRouter.ai for intelligent routing?

The factors considered by FastRouter.ai for intelligent routing include cost, latency, and output quality of the AI language model.

Can FastRouter.ai handle high volumes of queries per second?

Yes, FastRouter.ai is built to handle high volumes of queries per second, making it a scalable solution from startups to large enterprises.

+ Show 34 more

How does cost control and governance work in FastRouter.ai?

FastRouter.ai provides mechanisms for cost control and governance by enabling real-time tracking and limitation of usage by project, team, or cost center. This simplifies budgeting and helps in optimizing expenses.

What insights does FastRouter.ai provide us in real-time?

FastRouter.ai provides real-time insights into usage patterns. This includes information on tokens consumed, requests made, and costs incurred across keys and projects, which assists businesses in monitoring and managing their operations effectively.

How does FastRouter.ai ensure uninterrupted service?

FastRouter.ai ensures uninterrupted service through its intelligent failover infrastructure. It constantly monitors endpoints for potential outages and rate limits, allowing a swift switch to healthy endpoints when necessary.

What capabilities does FastRouter.ai's failover infrastructure possess?

FastRouter.ai's failover infrastructure possesses the capability to constantly monitor providers for potential outages and rate limits in real time. It also has the ability to automatically switch to healthy endpoints as needed to ensure an uninterrupted service.

Does using FastRouter.ai require extensive code changes?

No, using FastRouter.ai does not require extensive code changes. It is designed to be user-friendly and can easily be integrated with existing applications.

How does FastRouter.ai simplify the AI development process?

FastRouter.ai simplifies the AI development process by enabling the integration of numerous top AI language models via a single API, automatically selecting the most suitable model for each task, providing real-time insights for effective operation management, and ensuring uninterrupted service through intelligent failover infrastructure.

Can FastRouter.ai replace an existing OpenAI API?

Yes, FastRouter.ai can easily replace an existing OpenAI API. It has been designed to make the integration process efficient and swift.

How can FastRouter.ai optimize expenses?

FastRouter.ai optimizes expenses by automatically choosing the most suitable language model for each task based on cost, latency, and output quality. This use of intelligent routing to less expensive models without compensating output quality leads to significant savings.

How does FastRouter.ai facilitate in selecting and deploying the right LLM for each task?

FastRouter.ai facilitates the selection and deployment of the right language logic model (LLM) for each task by automatically selecting the most suitable model. This intelligent routing is based on various factors such as cost, latency, and output quality.

How easy is it to integrate FastRouter.ai in our system?

Integrating FastRouter.ai into your system is simple and seamless. It does not require extensive code changes and can be easily replaced with an existing OpenAI API.

Does FastRouter.ai provide a way to track and limit usage by project, team, or cost center?

Yes, FastRouter.ai provides the feature of real-time monitoring and limitation of usage by project, team, or cost center. This ability aids in cost control and governance of AI usage.

Can FastRouter.ai help in reducing AI costs?

Yes, FastRouter.ai can help significantly in reducing AI costs. It does so by automatically selecting the most cost-effective language model for each task without compromising on output quality.

How reliable is FastRouter.ai in terms of service and output quality?

FastRouter.ai is highly reliable in terms of service and output quality. It ensures uninterrupted service by swiftly switching to healthy endpoints during potential outages or rate limits. The output quality is maintained by carefully selecting the most suitable language model based on cost, latency, and output quality.

How does FastRouter.ai manage to facilitate swift and reliable access across different AI language model providers?

FastRouter.ai facilitates swift and reliable access to different AI language model providers by serving as a unified API gateway. It seamlessly integrates these models, thereby providing quick, reliable access across various providers.

What is FastRouter.ai?

FastRouter.ai is a unified API gateway tailored for AI language models. The platform optimizes and streamlines the management of AI applications by enabling connectivity with top AI models through a solitary API interface.

Which AI language models does FastRouter.ai support?

FastRouter.ai supports a wide array of top-tier language models like GPT-5, Veo 3, Grok 4, GPT Image 1, Claude 4 Opus, Gemini 2.5 Pro, and other high-end models.

What is the purpose of Intelligent Routing in FastRouter.ai?

Intelligent Routing in FastRouter.ai serves the purpose of automatically selecting the most apt AI language model for each distinct task. It uses different parameters like cost, latency, and output quality in its decision-making process to ensure optimal usage and cost-effectiveness.

How does FastRouter.ai handle high volumes of queries?

FastRouter.ai can effortlessly handle high volumes of queries. It has been built to function with limitless queries per second (QPS), thereby making it a robust solution that can meet the needs of both startups and large corporation handling massive QPS.

What mechanisms are available for cost control and governance in FastRouter.ai?

FastRouter.ai promotes cost control and governance through its advanced mechanisms, which allow for real-time tracking and limitation of usage by project, team, or cost center. These features help in smoothing out budgeting and cost optimizations. The platform also allows the definition of budgets, rate limits as well as model permissions per API key or project.

Does FastRouter.ai provide any sort of real-time tracking?

Yes, FastRouter.ai provides real-time tracking. The platform has a governance system that allows users to monitor usage in real time. It also provides instant visibility into tokens consumed, requests made, and costs incurred across keys and projects.

How does FastRouter.ai assure uninterrupted AI service?

FastRouter.ai ensures uninterrupted AI services through its Instant Failover feature. By constantly monitoring providers for potential outages and rate limits, FastRouter.ai can automatically switch to healthy endpoints when needed.

What makes FastRouter.ai user-friendly?

FastRouter.ai is user-friendly owing to its simplified integration process and the minimization of extensive code changes. The platform's design focuses on expediting the AI development process.

How does FastRouter.ai simplify the integration process?

FastRouter.ai simplifies the integration process through its Unified API. This API allows users to connect to a variety of top AI models, thus eradicating the necessity of multiple SDKs or code refactorings within user stack.

What features of FastRouter.ai aid in cost efficiency?

FastRouter.ai aids in cost efficiency through features like Smart Routing, which dynamically routes requests to the most suitable model based on criteria like cost, latency, and output quality. It also allows automated routing to cheaper models without degrading output quality. Moreover, it provides cost management tools such as budgeting, rate limit, and model permission settings.

What kind of real-time insights does FastRouter.ai provide?

FastRouter.ai provides real-time insights into usage patterns, including data on tokens consumed, requests made, and costs incurred. This actionable information aids businesses in effectively monitoring and managing their operations.

How easy is it to replace an existing OpenAI API with FastRouter.ai?

Replacing an existing OpenAI API with FastRouter.ai is seamless. It involves merely substituting the OpenAI endpoint with the FastRouter's URL without any necessity for code changes.

How does FastRouter.ai handle the selection of AI language models?

FastRouter.ai deploys an Intelligent Routing feature to handle the selection of AI language models. This feature assesses various factors such as cost, latency, and output quality to automatically select the optimum model for each task, ensuring efficient usage and reduced costs.

What is FastRouter.ai's Automatic Routing feature?

The Automatic Routing feature in FastRouter.ai helps in the automatic selection of the most suitable AI language model for every individual task. This contributes to the reduction of costs while maintaining performance.

How does FastRouter.ai control usage according to project, team, or cost center?

FastRouter.ai controls usage according to project, team, or cost center using its governance system. It offers real-time tracking functionality capable of imposing limitations on usage, thus allowing precise control and management of spending.

Does FastRouter.ai support connectivity with text, image, and audio models?

Yes, FastRouter.ai supports connectivity with text, image, and audio models. Its Unified API enables users to seamlessly connect to over 100 text, image, and audio models, eliminating the need for multiple SDKs or code refactorings.

What is FastRouter.ai's Smart Routing system?

FastRouter.ai's Smart Routing system evaluates costs, latency, and output quality on each request to dynamically route it to the optimal model. This maximizes performance while minimizing expenses without any manual oversight.

What is the Instant Failover feature offered by FastRouter.ai?

The Instant Failover feature offered by FastRouter.ai provides a reliable, uninterrupted AI service. By monitoring providers for outages and rate-limits in real time, this feature can automatically switch to healthy endpoints when any disruption is detected.

How does FastRouter.ai monitor providers for outages and rate limits?

FastRouter.ai monitors providers for outages and rate limits through its Instant Failover feature. FastRouter.ai consecutively checks endpoints to identify potential outages or rate limits, and immediately switches to a functional endpoint when an outage or surpassing of the rate limit is detected.

How does FastRouter.ai optimize performance while minimizing costs?

FastRouter.ai optimizes performance while minimizing costs through its Smart Routing system. It evaluates cost, latency, and output quality on each call to dynamically route requests to the most suitable model. Thus, it ensures high performance and cost efficiency with zero oversight.

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