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features
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support

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Description

FastRouter serves as a comprehensive API gateway designed to facilitate AI applications in accessing a variety of large language, image, and audio models (such as GPT-5, Claude 4 Opus, Gemini 2.5 Pro, and Grok 4) through a streamlined OpenAI-compatible endpoint. Its automatic routing capabilities intelligently select the best model for each request by considering important factors like cost, latency, and output quality, ensuring optimal performance. Additionally, FastRouter is built to handle extensive workloads without any imposed query per second limits, guaranteeing high availability through immediate failover options among different model providers. The platform also incorporates robust cost management and governance functionalities, allowing users to establish budgets, enforce rate limits, and designate model permissions for each API key or project. Real-time analytics are provided, offering insights into token utilization, request frequencies, and spending patterns. Furthermore, the integration process is remarkably straightforward; users simply need to replace their OpenAI base URL with FastRouter’s endpoint while configuring their preferences in the user-friendly dashboard, allowing the routing, optimization, and failover processes to operate seamlessly in the background. This ease of use, combined with powerful features, makes FastRouter an indispensable tool for developers seeking to maximize the efficiency of their AI applications.

Description

TensorZero serves as an open-source platform for LLMOps, seamlessly integrating an LLM gateway, observability, evaluation, optimization, and experimentation into a cohesive system. This platform establishes a feedback loop that enhances LLM applications by transforming production metrics and user insights into models and agents that are more intelligent, efficient, and cost-effective. By providing a gateway, TensorZero enables teams to connect once and subsequently access a wide array of leading LLM providers through a singular, consolidated API. This encompasses both API and self-hosted models while offering functionalities such as tool utilization, structured outputs, batch inference, embeddings, multimodal inputs, caching, routing, retries, fallbacks, load balancing, precise timeouts, usage monitoring, customized rate limitations, and protection of provider keys. Developed in Rust, TensorZero prioritizes high performance, ensuring exceptional throughput and minimal latency for production tasks, all while allowing teams the flexibility to implement only the features they require. Its observability component captures inferences and feedback within the user's own database, which can be accessed programmatically or via the open-source user interface. In doing so, TensorZero not only enhances the user experience but also facilitates more effective decision-making through accessible data analytics.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

GPT-5.1 Pro Yes 
GPT-5.1 Thinking Yes 
GPT-5.2 Thinking Yes 
GPT-5.4 Yes 
GPT-5.4 Pro Yes 
GPT-5.6 Luna Yes 
GPT-5.6 Sol Yes 
GPT-5.6 Sol Ultrafast Yes 
GPT-5.6 Terra Yes 
GPT-6 Luna Yes 
GPT-6 Sol Yes 
GPT‑5.4 Thinking Yes 
Gemini 3 Flash Yes 
Gemini 3 Pro Yes 
Gemini 3.1 Flash-Lite Yes 
Grok 4 Yes 
Grok 4.1 Yes 
Holo4 Yes 
OpenAI Bel Yes 

Integrations

GPT-5.1 Pro No 
GPT-5.1 Thinking No 
GPT-5.2 Thinking No 
GPT-5.4 No 
GPT-5.4 Pro No 
GPT-5.6 Luna No 
GPT-5.6 Sol No 
GPT-5.6 Sol Ultrafast No 
GPT-5.6 Terra No 
GPT-6 Luna No 
GPT-6 Sol No 
GPT‑5.4 Thinking No 
Gemini 3 Flash No 
Gemini 3 Pro No 
Gemini 3.1 Flash-Lite No 
Grok 4 No 
Grok 4.1 No 
Holo4 No 
OpenAI Bel No 

Pricing Details

No price information available.
Free Trial Yes 
Free Version No 

Pricing Details

Free
Free Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

FastRouter

Founded

2025

Country

United States

Website

fastrouter.ai/

Vendor Details

Company Name

TensorZero

Founded

2023

Country

United States

Website

github.com/tensorzero/tensorzero

Product Features

Alternatives

Alternatives