Hermes-4-405B
by Nous ResearchChat
Reasoning model for deliberate analysis, multi-step problem solving, and tool use
- Context
- 131K tokens
- Max output
- 128,000 tokens
- Parameters
- 406B total
- Released
- 2025-08-26
- Weights
- Open
- Licence
- llama3
nousresearch/hermes-4-405b · also seen as NousResearch/hermes-4-405b:thinking
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2025-08-26
- Weights
- Opennot gated
- License
- llama3
- Input
- Text
- Output
- Text
- Context window
- 131,072 max across endpoints
- Max output
- 128,000
- Providers
- 2 + 4 gateways, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $1.00 in · $3.00 out per 1M tokens · across all 2 providers
More details
- Last updated
- 2026-02-04
- Knowledge cutoff
- Weights link
- Hugging Face · NousResearch/Hermes-4-405B
- Parameters
- 406B total
- Base model
- meta-llama/Llama-3.1-405B
Capabilities
Across all endpoints: supported if any endpoint supports it.
- Tool calling
- Parallel toolsunknown
- Structured output
- Reasoning
- Image input
- PDF input
- Audio input
- Audio outputunknown
- Video input
- Prompt cachingunknown
- Web searchunknown
- Computer useunknown
- System messagesunknown
- Assistant prefillunknown
- Temperature
- Streamingunknown
- Attachments
Endpoints
One row per provider and variant; gateways are listed separately.
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Price history
Atom feedNo change since 19 Oct 2026. The cheapest direct price has been $1.00 in / $3.00 out per 1M tokens at Nebius Token Factory on every data refresh since then.
Tracked from 19 Oct 2026. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON
Cost calculator
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Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).
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