Hermes 4 Models by Nous Research
2 models2025Up to 128k ctxFrom $0.05/1M input
Details
ResearcherNous Research
LicenseLlama 3 Community
Commercial useCommercial use with conditions
Models2
Released2025
Max context128k
Capabilities
ReasoningAll models
Links
WebsiteAbout
The Hermes 4 family is Nous Research's open-source instruction-tuned series built on Llama 3.1 foundations, spanning 70B and 405B parameter variants with hybrid reasoning behavior and hosted availability through Nous Portal.
Current Variants
Use-when guidance is derived from seed capabilities, context, release, and replacement fields.
2 in view
Hermes-4-70BCurrent
Use when the workload needs 128k context, 70B parameters, and reasoning.
2025-09128k context70B parametersreasoning
Hermes-4-405BCurrent
Use when the workload needs 128k context, 405B parameters, and reasoning.
2025-09128k context405B parametersreasoning
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Hermes-4-70B | Use when the workload needs 128k context, 70B parameters, and reasoning. | 2025-09 | 128k context70B parametersreasoning | Current |
| Hermes-4-405B | Use when the workload needs 128k context, 405B parameters, and reasoning. | 2025-09 | 128k context405B parametersreasoning | Current |
Release Timeline
1 release group2025-09
2 current
Hermes-4-405B
Current128k context405B parametersreasoning
Hermes-4-70B
Current128k context70B parametersreasoning
Specifications(2 models)
| Model | Released | Context | Parameters | Reasoning |
|---|---|---|---|---|
| Hermes-4-70B | 2025-09 | 128k | 70B | Yes |
| Hermes-4-405B | 2025-09 | 128k | 405B | Yes |
Available From(1 provider)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| Hermes-4-70B | Nous Portal | $0.05 | $0.2 | Serverless |
| Hermes-4-405B | Nous Portal | $0.09 | $0.37 | Serverless |
Frequently Asked Questions
- What is Hermes 4 used for?
- Hermes 4 is used for reasoning. The family description and listed model capabilities point to those workloads as the best fit.
- How does Hermes 4 compare to MOSS-Audio?
- Hermes 4 by Nous Research is strongest where you need reasoning, while MOSS-Audio by MOSI Intelligence is the closest related family to check for multimodal. Hermes 4 has 2 listed variants and reaches up to 128k context, so compare the specs and pricing tables before choosing a production model.
- Which Hermes 4 model should I use?
- For the lowest listed input price, start with Hermes-4-70B through Nous Portal at $0.05/1M input tokens. For the most capable/latest local choice, evaluate Hermes-4-70B with 128k context and reasoning.
