Switch between OpenAI, Claude, and Gemini to find the perfect fit for each use case.
No single AI model is best for everything. Multi-LLM support lets you optimize for quality, speed, or cost per mailbox.
3
LLM providers supported
6+
AI models available
Per-agent
Model configuration
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We have different needs for different departments — technical support needs the best quality, while our FAQ mailbox needs speed. Can we use different AI models?
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Absolutely! This is exactly what our multi-LLM support is designed for. Here's how to set it up: **Per-Agent Model Selection:** Each mailbox/agent can use a different AI model: - **Technical Support Mailbox** → Claude Opus or GPT-5 - Best for complex, nuanced technical responses - Highest accuracy and reasoning capability - **FAQ Mailbox** → Gemini Flash or GPT-5 Nano - Fastest response generation - Most cost-effective for routine questions - **Customer Success Mailbox** → Claude Sonnet or GPT-5 Mini - Great balance of quality, tone, and speed - Excellent at empathetic, personalized responses **How to Configure:** 1. Go to Settings > Agents 2. Select the agent/mailbox you want to configure 3. Under 'AI Model', choose the provider and model 4. Save — changes take effect immediately **Flexibility:** - Switch models anytime without data loss - A/B test models to compare performance - Use your own API keys for any provider Want help choosing the right model for each department?
Choose from OpenAI, Claude, and Gemini per mailbox.
Technical support gets accuracy, FAQ gets speed.
Switch models anytime without migration or data loss.
Use premium models where needed and cost-effective ones where not.
OpenAI (GPT-5 family), Anthropic (Claude family), and Google (Gemini family). New providers are added regularly.
Yes — run two agents on the same mailbox with different models to compare response quality and speed.
You can use Relay's included AI credits for all providers, or bring your own API keys for specific providers.
Start your free trial and see how Relay handles multi-llm support with AI-drafted responses.