Last refreshed 2026-06-15. Next refresh: weekly.
Why use Hermes-4-405B on OpenRouter?
OpenRouter offers Hermes-4-405B with pay-as-you-go pricing at $1.00/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare Hermes-4-405B across 2 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: nousresearch/hermes-4-405bnousresearch/hermes-4-405bRequest example
nousresearch/hermes-4-405b.Gotchas
- Use provider model ID "nousresearch/hermes-4-405b", not the LLMReference slug "hermes-4-405b".
Compare Hermes-4-405B Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Nous Portal | $0.09 | $0.37 |
| OpenRouter | $1.00 | $3.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.00 |
| Output tokens | $3.00 |
Capabilities
About Hermes-4-405B
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.
FAQ
What does Hermes-4-405B cost on OpenRouter?
On OpenRouter, Hermes-4-405B costs $1 per 1M input tokens and $3 per 1M output tokens.
What is the context window for Hermes-4-405B on OpenRouter?
Hermes-4-405B supports a 131k token context window on OpenRouter.
How does OpenRouter compare to other Hermes-4-405B providers?
Hermes-4-405B is available from 2 providers. The cheapest input pricing is $0.09/1M tokens from Nous Portal.
What API model ID do I use for Hermes-4-405B on OpenRouter?
Use the model ID nousresearch/hermes-4-405b when calling OpenRouter's API.
Who created Hermes-4-405B?
Hermes-4-405B was created by Nous Research as part of the Hermes 4 model family.
Is Hermes-4-405B open source?
Hermes-4-405B has open weights under Llama 3 Community according to the seed data, but that does not necessarily mean an OSI-approved open-source license.