Hermes-4-405B
Hermes-4-405B is worth evaluating for long context when its provider route and context window match the workload.
Use it for
- Teams evaluating long context
- Workloads that can use a 128k context window
- Buyers comparing 2 tracked provider routes
Do not use it for
- Vision or document-understanding workloads
- Strict JSON or tool-calling flows
- Family
- Hermes 4
- Released
- 2025-09-22
- Context
- 128k
- Parameters
- 405B
- Knowledge cutoff
- 2023-12
- Openness
- Open weights
- License
- Llama 3 CommunityCommercial use: conditional
- Weights
- Unknown
- Code
- Unknown
Cheapest of 2 routes · Nous Portal
About
Hermes 4's 405B hosted variant on Nous Portal. The portal describes it as the largest Hermes 4 model, focused on advanced reasoning and creative depth rather than inference speed or cost.
Hermes-4-405B is an open-weight model in the Hermes 4 family. The structured metadata tracks a 128k-token context window and reasoning. This page tracks provider routes through Nous Portal and OpenRouter, with the cheapest tracked route listed at $0.09 input and $0.37 output per 1M tokens. No headline benchmark score is tracked for Hermes-4-405B yet.
Top use-case fit
Long context
Included by capability and metadata signals in the decision map.
Provider price ladder
Compare all 2Compare API pricing across 2 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| Nous Portal | $0.090 | $0.370 | Serverless |
| OpenRouter | $1.00 | $3.00 | Serverless |
Capabilities
Benchmark peer barsfor Long context
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
Frequently asked questions
What is the context window of Hermes-4-405B?
Hermes-4-405B has a context window of 128k tokens.
How much does Hermes-4-405B cost?
Hermes-4-405B pricing ranges from $0.09/1M to $1/1M input tokens depending on the provider.
When was Hermes-4-405B released?
Hermes-4-405B was released on 2025-09-22.
Which providers offer Hermes-4-405B?
Hermes-4-405B is available from 2 providers: Nous Portal, OpenRouter.
Cheapest of 2 routes · Nous Portal