RouteLLM

RouteLLM

LMSYS
+
+

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About

FastRouter is a unified API gateway that enables AI applications to access many large language, image, and audio models (like GPT-5, Claude 4 Opus, Gemini 2.5 Pro, Grok 4, etc.) through a single OpenAI-compatible endpoint. It features automatic routing, which dynamically picks the optimal model per request based on factors like cost, latency, and output quality. It supports massive scale (no imposed QPS limits) and ensures high availability via instant failover across model providers. FastRouter also includes cost control and governance tools to set budgets, rate limits, and model permissions per API key or project, and it delivers real-time analytics on token usage, request counts, and spending trends. The integration process is minimal; you simply swap your OpenAI base URL to FastRouter’s endpoint and configure preferences in the dashboard; the routing, optimization, and failover functions then run transparently.

About

Developed by LM-SYS, RouteLLM is an open-source toolkit that allows users to route tasks between different large language models to improve efficiency and manage resources. It supports strategy-based routing, helping developers balance speed, accuracy, and cost by selecting the best model for each input dynamically.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and AI engineering teams wanting a tool providing access, optimized performance, and cost governance under a single API

Audience

AI developers and researchers looking to optimize workflows using multiple LLMs through intelligent routing and performance-aware model selection

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Supported

Pricing

No information available.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

FastRouter
Founded: 2025
United States
fastrouter.ai/

Company Information

LMSYS
github.com/lm-sys/RouteLLM

Alternatives

Alternatives

Categories

AI Gateways Supported
API Gateways Supported
LLM Routers Supported

Categories

AI Gateways Supported
LLM Routers Supported

Integrations

OpenAI Supported
Anyscale Not Supported
Chatbot Arena Not Supported
Claude Opus 4 Supported
GPT-5.1 Instant Supported
GPT-5.1 Pro Supported
GPT-5.1 Thinking Supported
GPT-5.2 Thinking Supported
GPT-5.4 Supported
GPT-5.5 Supported
GPT-5.6 Sol Supported
GPT-6.1 Sol Supported
GPT‑5.4 Thinking Supported
Gemini 3 Flash Supported
Gemini 3.1 Pro Supported
Gemini Enterprise Not Supported
Grok 4.1 Supported
Grok 4.1 Thinking Supported
Grok 4.3 Supported
Taam Cloud Not Supported

Integrations

OpenAI Supported
Anyscale Supported
Chatbot Arena Supported
Claude Opus 4 Not Supported
GPT-5.1 Instant Not Supported
GPT-5.1 Pro Not Supported
GPT-5.1 Thinking Not Supported
GPT-5.2 Thinking Not Supported
GPT-5.4 Not Supported
GPT-5.5 Not Supported
GPT-5.6 Sol Not Supported
GPT-6.1 Sol Not Supported
GPT‑5.4 Thinking Not Supported
Gemini 3 Flash Not Supported
Gemini 3.1 Pro Not Supported
Gemini Enterprise Supported
Grok 4.1 Not Supported
Grok 4.1 Thinking Not Supported
Grok 4.3 Not Supported
Taam Cloud Supported
Claim FastRouter and update features and information
Claim FastRouter and update features and information
Claim RouteLLM and update features and information
Claim RouteLLM and update features and information