Nous: Hermes 4 405B API Pricing
Nous: Hermes 4 405B costs $1.00 per 1M input tokens and $3.00 per 1M output tokens. Context window: 131K. Prices verified 2026-10-21 · source
Alternatives to consider
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Cheapest nousresearch model — 53% less per month
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High adoption means battle-tested weights, more fine-tunes/quants, and faster bug fixes. View on HuggingFace →
From our own daily snapshot archive — independent of provider announcements.
Intelligence measures reasoning/knowledge/coding benchmarks. A high score with a low blended price = value pick; check the value chart to see where this model lands.
Higher effort = deeper thinking = more reasoning tokens billed as output.
Training data ends here — newer events require retrieval or web search.
What would Nous: Hermes 4 405B cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $20.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $70.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $165.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $46.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About Nous: Hermes 4 405B
Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research. It introduces a hybrid reasoning mode, where the model can choose to deliberate internally with...
Compare Nous: Hermes 4 405B with
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Popular head-to-heads — see all on the comparisons index.
Frequently asked questions
How much does Nous: Hermes 4 405B cost?
Nous: Hermes 4 405B costs $1.00 per 1M input tokens and $3.00 per 1M output tokens. Verified 2026-10-21 — provider source.
What is the context window?
131K tokens, with up to 118K 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 98% on a typical workload with comparable quality.
Official resources
- Nous: Hermes 4 405B on OpenRouter — live endpoint, pricing source of record.
- Artificial Analysis leaderboard → — independent intelligence and performance rankings.
- Shred your current bill — paste a CSV and see if switching saves money.