nousresearch
Nous: Hermes 4 405B
nousresearch/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...
- Type
- text
- Provider
- nousresearch
- Model ID
- nousresearch/hermes-4-405b
- Capabilities
- reasoning
- Context window
- 131K tokens
- Self-hostable
- Yes — runs on your own GPU
- Input price
- $1.10 / 1M tokens
- Output price
- $3.30 / 1M tokens
Cloud price is billed from prepaid credits when a request fails over to the cloud. Open-weight models run free on GPUs you own — the gateway routes to your nodes first.
What it costs to run
cloud · 1M in + 1M out
$4.40
$1.10 for a million input tokens plus $3.30 for a million output tokens, billed from credits only when a request fails over to the cloud.
your hardware
$0 / token
Served from a workstation or on-prem server you own, there is no per-token fee — the marginal cost is power.
Run it on your own hardware
Estimated GPU memory for Nous: Hermes 4 405B (405B parameters), for the weights alone — add room for the context cache.
- Q4_K_M
- ~230.8 GBmulti-GPU or large unified memory
- Q8_0
- ~400.6 GBmulti-GPU or large unified memory
- FP16 / BF16
- ~755.1 GBmulti-GPU or large unified memory
Install the agent on the machine and it dials out to the gateway over a single WebSocket — no port forwarding or inbound firewall rules. Requests for this model go to your node first and fail over to the cloud only when it can't serve.
/// initialize
Call Nous: Hermes 4 405B through one OpenAI-compatible endpoint.
Serve it from hardware you own, with cloud failover when your nodes are busy or offline.
no credit card · 2 nodes free · openai-compatible
Frequently asked questions
- What is the context window of Nous: Hermes 4 405B?
- Nous: Hermes 4 405B accepts up to 131,072 tokens (131K) of context per request.
- How much does Nous: Hermes 4 405B cost per million tokens?
- Through Wide Area Intelligence, Nous: Hermes 4 405B costs $1.10 per 1M input tokens and $3.30 per 1M output tokens when served from the cloud, billed from prepaid credits. A workload of 1M input plus 1M output tokens costs $4.40.
- Can I run Nous: Hermes 4 405B on my own hardware?
- Yes — Nous: Hermes 4 405B is an open-weight model you can run on a workstation or on-prem server you own. At Q4_K_M it needs roughly 230.8 GB of GPU memory, plus room for the context cache — more than a single 80 GB card, so plan for multiple GPUs or a large unified-memory machine. Wide Area Intelligence routes requests to your own nodes first and fails over to the cloud only when they can't serve.