OpenRouter

A single API endpoint that routes to 300+ models across dozens of providers, including 30+ completely free models. Use the OpenAI SDK format so switching models requires just changing a string. Best for developers who want to compare models or need a fallback chain.

AI ToolFree Tier: 30+ free models; OpenAI-compatibleCompany: OpenRouterCategory: Developer ToolsQuick Start: Sign up at openrouter.ai → Get your API key → Point the OpenAI SDK to openrouter.ai/api/v1 and pick from 30+ free models

OpenRouter

Unified API gateway to 30+ free models

Visit OpenRouter →

A single API endpoint that routes to 300+ models across dozens of providers, including 30+ completely free models. Use the OpenAI SDK format so switching models requires just changing a string. Best for developers who want to compare models or need a fallback chain.

FREE TIER
30+ free models; OpenAI-compatible
COMPANY
OpenRouter
CATEGORY
Developer Tools › APIs & Inference
PRIVACY
Supports BYOK
TAGS
apigatewaymulti-model

QUICK START

Sign up at openrouter.ai → Get your API key → Point the OpenAI SDK to openrouter.ai/api/v1 and pick from 30+ free models

BEST FOR

  • ▸Builders who want to swap models without code changes
  • ▸30+ free models behind one OpenAI-compatible endpoint
  • ▸Fallback chains and model A/B testing

NOT FOR

  • ✕Lowest-latency serving — adds a routing hop
  • ✕Teams that need guaranteed uptime SLAs

◈ TYPICALLY PAIRED WITH

Tools that appear alongside OpenRouter in AIArsenal's curated stacks.

n8n
Self-hosted automation platform — 176K stars, 400+ integrations
Agents & Auto
CrewAI
Multi-agent orchestration — role-based, 44K+ stars
Agents & Auto
Exa.ai
Neural search API — ideal for AI agents
End-User Tools
Mem0
Persistent AI memory — 26% better accuracy, 91% lower latency
Developer Tools
Finding similar tools…
← Back to all tools