OpenRouter
Unified API for 200+ models. One API key, one billing dashboard. OpenAI, Anthropic, Google, Meta, Mistral, and more. Automatic fallbacks and load balancing.
OpenRouter gives you a single API endpoint to access every major AI model - OpenAI (GPT-4o, o3), Anthropic (Claude), Google (Gemini), Meta (Llama), Mistral, and 200+ more. One API key, unified billing, automatic fallbacks if a provider is down. It's essential for comparing models without managing multiple API keys and billing accounts. I use it when I need to quickly swap between models for testing or when building apps that should work across providers.
Similar Tools
Claude
Anthropic's AI. Opus 4.6 for hard problems, Sonnet 4.6 for speed, Haiku 4.5 for cost. 200K context window. Best coding model I've tested. Max plan ($200/mo).
ChatGPT
OpenAI's flagship. GPT-4o for general use, o3 for reasoning, Codex for coding. 300M+ weekly users. Tasks, agents, web browsing, DALL-E, code interpreter.
DeepSeek
Open-source reasoning models from China. DeepSeek-R1 rivals o1 on math and code benchmarks. V3 for general use. Fully open weights. Extremely cost-effective API.
Llama
Meta's open-source model family. Llama 4 available in Scout (17B active) and Maverick (17B active, 128 experts). Free to use, modify, and deploy commercially.
Get started with OpenRouter
Unified API for 200+ models. One API key, one billing dashboard. OpenAI, Anthropic, Google, Meta, Mistral, and more. Automatic fallbacks and load balancing.
Try OpenRouterGet weekly tool reviews
Honest takes on AI dev tools, frameworks, and infrastructure - delivered to your inbox.
Subscribe FreeMore AI Models Tools
Claude
Anthropic's AI. Opus 4.6 for hard problems, Sonnet 4.6 for speed, Haiku 4.5 for cost. 200K context window. Best coding model I've tested. Max plan ($200/mo).
ChatGPT
OpenAI's flagship. GPT-4o for general use, o3 for reasoning, Codex for coding. 300M+ weekly users. Tasks, agents, web browsing, DALL-E, code interpreter.
DeepSeek
Open-source reasoning models from China. DeepSeek-R1 rivals o1 on math and code benchmarks. V3 for general use. Fully open weights. Extremely cost-effective API.
Related Guides
Run AI Models Locally with Ollama and LM Studio
Install Ollama and LM Studio, pull your first model, and run AI locally for coding, chat, and automation - with zero cloud dependency.
Getting StartedModel Aliases - Claude Code
Use opus, sonnet, haiku, and best to switch models easily.
Claude CodeCustom Model Option - Claude Code
Add gateway or custom models to the picker via environment variables.
Claude CodeRelated Posts
Mercury 2 Developer Guide: Building With a Diffusion LLM in Production
A hands-on developer guide to Mercury 2 from Inception Labs. OpenAI-compatible API, reasoning levels, tool use, structur...
Claude Opus 4.7: The Developer's Guide to Anthropic's New Flagship
Opus 4.7 is here. Sharper coding, longer agentic runs, better tool use, and a price that finally makes Opus livable for...
Flagship: Cloudflare Feature Flags for AI Apps
Cloudflare Flagship is feature flags built for AI: model swaps, agent gates, and prompt rollouts as first-class primitiv...
DeepSeek V4: The Developer's Guide to Flash and Pro
DeepSeek V4 splits into Flash and Pro, ships a 1M context window, and undercuts every closed model on price. Here's how...
Assistants to Responses API: A Migration Field Guide
OpenAI is sunsetting the Assistants API in 2026. Here is a tested migration plan to the Responses API - code, state, t...
SAM 3.1: Realtime Video Segmentation in Apps
SAM 3.1 finally hits the latency budget for realtime video. Here is how to wire Meta's new segmentation model into a pro...
