OpenRouter

LLM Platforms & APIs active ★ 4.5 freemium Free tier available

OpenRouter is a unified API gateway and marketplace that provides access to over 200 large language models (LLMs) from various providers through a single, OpenAI-compatible API. It acts as an abstraction layer, simplifying LLM integration for developers while offering features like model routing and cost optimization to manage expenses and improve performance.

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Key Features

Unified LLM APIProvides a single, consistent API endpoint to access over 200 large language models from various providers, simplifying development and integration.

LLM MarketplaceOffers a comprehensive marketplace to discover, compare, and utilize a wide range of LLMs, including open-source and proprietary models.

Cost Optimization & RoutingIntelligently routes API requests to the most cost-effective or performant LLM based on user-defined criteria, reducing operational expenses.

OpenAI API CompatibilityDesigned to be fully compatible with the OpenAI API specification, enabling seamless migration and integration for existing OpenAI users.

Low Latency InferenceLeverages edge computing to minimize latency between user applications and LLM inference, ensuring faster response times.

Use Cases

Accessing a wide variety of LLMs through a single, consistent API
Optimizing costs and performance by routing requests to the best-value LLM
Rapid prototyping and experimentation with different LLM models
Building AI applications that require flexible and scalable LLM backends

Pros

Unified API for 200+ LLMs, simplifying integration and reducing vendor lock-in
Significant cost savings through intelligent model routing and optimization
OpenAI-compatible API, allowing for easy migration of existing applications
Low latency due to edge-based inference, improving user experience
Extensive marketplace for discovering and comparing new LLMs

Cons

A 5.5% fee is applied when purchasing credits through OpenRouter
May introduce an additional layer of abstraction that could be unnecessary for very simple, single-LLM use cases

Pricing

Plan	Price
Free	Free
Pay-as-you-go	$0.001/per-token

Works With

ChatGPTCan route requests to OpenAI models, including ChatGPT, through its unified API.ClaudeProvides access to Anthropic's Claude models via its API gateway.GeminiIntegrates with Google's Gemini models, allowing developers to use them through the OpenRouter API.LangChainCan be used as an LLM provider within LangChain applications, offering access to its diverse model c CrewAICan serve as the LLM backend for AI agents built with CrewAI, leveraging its model routing capabilit