Claude Sonnet 4.5 vs Hermes 4 405B: side-by-side summary

Claude Sonnet 4.5 and Hermes 4 405B are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Sonnet 4.5, from Anthropic, has a 1,000,000-token context window and is priced at $3/M tokens input, $15/M tokens output on OpenRouter.

Hermes 4 405B, from Nous Research, has a 131,072-token context window and is priced at $1/M tokens input, $3/M tokens output on OpenRouter.

Context window

• Claude Sonnet 4.5: 1,000,000 tokens
• Hermes 4 405B: 131,072 tokens

Price

• Claude Sonnet 4.5: $3/M tokens input, $15/M tokens output
• Hermes 4 405B: $1/M tokens input, $3/M tokens output

Provided by

• Claude Sonnet 4.5: Anthropic
• Hermes 4 405B: Nous Research

• Claude Sonnet 4.5 model details, providers and pricing
• Hermes 4 405B model details, providers and pricing