Nous: Hermes 3 405B Instruct API Pricing
Nous: Hermes 3 405B Instruct costs $1.00 per 1M input tokens and $1.00 per 1M output tokens. Context window: 131K. Prices verified 2026-10-21 · source
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What would Nous: Hermes 3 405B Instruct cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $12.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $50.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $135.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $42.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About Nous: Hermes 3 405B Instruct
Hermes 3 is a generalist language model with many improvements over Hermes 2, including advanced agentic capabilities, much better roleplaying, reasoning, multi-turn conversation, long context coherence, and improvements across the...
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Frequently asked questions
How much does Nous: Hermes 3 405B Instruct cost?
Nous: Hermes 3 405B Instruct costs $1.00 per 1M input tokens and $1.00 per 1M output tokens. Verified 2026-10-21 — provider source.
What is the context window?
131K tokens, with up to 16K output tokens per response. That's roughly 164 pages of text in a single request.
Does it support prompt caching?
Prompt-caching pricing is not published for this model via OpenRouter.
What's a cheaper alternative?
ScaleDown: Summarize saves about 97% on a typical workload with comparable quality.
Official resources
- Nous: Hermes 3 405B Instruct on OpenRouter — live endpoint, pricing source of record.
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