Using Hermes-4-405B on OpenRouter

Quick Start

1. 1
   Create an account at OpenRouter and generate an API key.
2. 2
   Use the OpenRouter SDK or REST API to call nousresearch/hermes-4-405b — see the documentation for request format.
3. 3
   You'll be billed $1.00/1M input, $3.00/1M output tokens. See full pricing.

Code Examples

About OpenRouter

OpenRouter provides a unified interface for Large Language Models with better pricing, improved uptime, and no subscription requirements. Route across providers for cost optimization and reliability.

OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.

Pricing on OpenRouter

Capabilities

About Hermes-4-405B

Hermes 4's 405B hosted variant on Nous Portal. The portal describes it as the largest Hermes 4 model, focused on advanced reasoning and creative depth rather than inference speed or cost.