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…
Model by Nous Research
Install
Pick your client. Read the repository before you give any tool access to your data.
{
"model": "nousresearch/hermes-3-llama-3.1-405b",
"baseURL": "https://openrouter.ai/api/v1"
}OpenAI-compatible API: point any OpenAI SDK at the base URL and use this model id.
Settings it needs
OPENROUTER_API_KEYrequiredsecret
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About
Use cases: model-inference
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Price and limits
| Variant | Input $/M tokens | Output $/M tokens | Cached input $/M |
|---|---|---|---|
| Standard | $1 | $1 | — |
Price as of Oct 26, 2026 from OpenRouter. Prices change often; check before you rely on one.
- Provider
- Nous Research
- Model id
nousresearch/hermes-3-llama-3.1-405b- Context window
- 131,072 tokens (131K)
- Max output
- 16,384 tokens
- Input
- text
- Output
- text
- Tool calling
- Not listed
- Structured outputs
- Yes
- Reasoning
- No
- Weights
- Open: NousResearch/Hermes-3-Llama-3.1-405B
- Released
- Aug 16, 2024
- Knowledge cutoff
- 2023-12-31
- Retires
- Nov 2, 2026
Details
- Auth
- API key
- License
- License unknown
- Website
- nousresearch.com
- First seen
- Oct 24, 2026
- Last checked
- Oct 26, 2026
- Source
- OpenRouter
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Hermes 3 is a generalist language model with many improvements over [Hermes 2](/models/nousresearch/nous-hermes-2-mistral-7b-dpo), including advanced agentic…
ModelAFreshness: A$0.7 / $0.7131K ctxOpen weights - 0.587score
Hermes 4 405B
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Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research.
ModelAFreshness: A$1 / $3131K ctxOpen weights
Cite this page
Hermes 3 405B Instruct: price, context window, tool use. Agent Mart. https://agentmart.dev/models/nousresearch-hermes-3-llama-3-1-405b (last updated 2026-10-26)