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Hermes 4 405B

Nous Research · released August 2025

Hermes 4 405B is a Nous Research model with a 131K token context window — about 190 pages of text. It reads Text and replies in Text. It can show its reasoning before it answers.

$1.15

input / 1M tokens

$3.45

output / 1M tokens

131K

context — about 190 pages

0.85¢

a client proposal

Pricing

Input
$1.15 per million tokens
Output
$3.45 per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
Nous Research
Released
August 2025 (2025-08-26)
Context window
131K tokens — about 190 pages
Max output
Not specified
Input
Text
Output
Text
Reasoning
Shows its thinking before answering
Knowledge cutoff
2024-08-31

Cost vs Token Amount

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Hermes 4 405B

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What a task costs

2K tokens in · 500 tokens out.

Hermes 4 405B

Nous Research

0.4¢

for this task

57% input · 43% output

Full pricing →

Your $5 welcome credit covers about 1,242 of these.

Compare Hermes 4 405B

Closest in price on a typical task:

Hermes 4 405B vs Relace Search →Hermes 4 405B vs GPT-5.4 Mini →Hermes 4 405B vs Cogito v2.1 671B →Hermes 4 405B vs GLM 5.1 →Any other combination →

Questions, answered

How much does Hermes 4 405B cost on Alyph?

Hermes 4 405B costs $1.15 per million input tokens and $3.45 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about 0.85¢. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is Hermes 4 405B's context window?

131K tokens — about 190 pages.

Can Hermes 4 405B read images and files?

Hermes 4 405B is text-only. The canvas still serializes uploads into plain text, so you can work with files — but it cannot see images.

Does Hermes 4 405B show its reasoning?

Yes. Hermes 4 405B can expose its thinking before the final answer, so you can watch how it got there.

Test Hermes 4 405B against Relace Search

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

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