nousresearch

Nous: Hermes 4 405B

The Nous Hermes 4 405B is a language processing model developed by nousresearch. It handles text input modality and can handle contexts of up to 131072 tokens. This model supports reasoning capabilities but does not support tools or structured output. Considering its price point, the Nous Hermes 4 405B may be worth shortlisting for organizations with a specific focus on reasoning-heavy tasks that require contextual understanding. With a blended benchmark score of 75 across one independent benchmark, it demonstrates some ability in this area, although further testing would provide more insight into its performance. Its pricing at $1/M input and $3/M output tokens may also make it a viable option for those with a tight budget, but careful consideration of the model's capabilities is necessary to ensure it meets specific needs.

Quality Score
79/100
price + capability + benchmarks
Input Price
$1.00
per 1M tokens · checked 2026-09-23
Output Price
$3.00
per 1M tokens · checked 2026-09-23
Context Window
131,072
tokens

Benchmark results

Independent, published benchmarks. Blended score 75.0 across 1 benchmark, last refreshed 2026-09-23. How scoring works →

BenchmarkMeasuresScore
EQ-Bench emotional understanding in dialogue 65.2
Model ID
nousresearch/hermes-4-405b
Vendor
nousresearch
Released
August 2025
Tokenizer
Other
Input Modalities
text
Output Modalities
text
Max Output
117,964 tokens
Tool Calling
not supported
Structured Output
✓ supported
Reasoning Mode
✓ supported
Vision
text only
Audio
no
Moderated
no

What it costs in practice

Computed from the current $1.00/M input and $3.00/M output rates. Run your own numbers →

JobTokensCost
Summarize a 50-page report 30k in / 1.5k out $0.03
Classify 1,000 customer emails 500k in / 50k out $0.65
A month of a busy support chatbot 5M in / 2M out $11.00

Similar models

Quick answers

How much does Nous: Hermes 4 405B cost?
$1.00 per million input tokens and $3.00 per million output tokens.
What is Nous: Hermes 4 405B's context window?
131,072 tokens, roughly 196 pages of text in a single request.
Does Nous: Hermes 4 405B support tool calling?
It supports structured output, a reasoning mode.
Can Nous: Hermes 4 405B process images?
No, it is text-only on the input side.

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