OpenRouter

OpenRouter provides access to multiple AI providers through a single API. It's a great way to try different models without managing multiple API keys.

tip

IDE Mode only (Classic Edition): Like other API key providers, OpenRouter powers Chat, Context Builder, Oracle, and Pro Edit. Agent Mode requires a CLI harness — see Agent Providers for the six compatible CLIs.

What is OpenRouter?

OpenRouter is a unified API that routes requests to various AI providers including:

• Anthropic (Claude models)
• OpenAI (GPT models)
• Google (Gemini models)
• Meta (Llama models)
• Mistral AI
• And many more...

Setup

1. Create an account at openrouter.ai
2. Add credits to your account
3. Go to Keys → Create Key
4. Copy your API key
5. In RepoPrompt: Settings → API Settings → OpenRouter
6. Paste your key and click "Validate & Save"

Available Models

Once connected, OpenRouter models appear in your model selector with an "openrouter/" prefix. Popular options include:

• openrouter/anthropic/claude-sonnet-4.5
• openrouter/openai/gpt-5.4
• openrouter/google/gemini-3.0-preview
• openrouter/meta-llama/llama-3.1-70b
• openrouter/mistralai/mixtral-8x7b

Pricing

OpenRouter uses pay-per-token pricing that varies by model. Check openrouter.ai/models for current pricing.

When to Use OpenRouter

• Model variety: Easy access to models from many providers
• No commitment: Try models without signing up for each provider
• Cost comparison: Compare pricing across providers
• Fallback routing: OpenRouter can route to alternatives if a model is unavailable

tip

Direct vs OpenRouter: For your primary models, direct API keys often provide better performance and reliability. OpenRouter is great for exploration and accessing models you use occasionally.

tip

GPT-5.5 is not on OpenRouter: GPT-5.5 Low/Medium/High are available only through Codex CLI, and GPT-5.5 Pro is ChatGPT Pro web only. OpenRouter continues to serve the GPT-5.4 family for OpenAI routing.