What is Nous: Hermes 3 405B Instruct's context window?

Nous: Hermes 3 405B Instruct accepts up to 131,072 tokens in a single request, and can return up to 16,384 output tokens.

Is there a cheaper OpenRouter model than Nous: Hermes 3 405B Instruct?

Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $1.00 for Nous: Hermes 3 405B Instruct, with a 16,385 token context window.

Where does this Nous: Hermes 3 405B Instruct price come from?

From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

Nous: Hermes 3 405B Instruct pricing

Hermes 3 is a generalist language model with many improvements over Hermes 2, including advanced agentic capabilities, much better roleplaying, reasoning, multi-turn conversation, long context coherence, and improvements across… Nous: Hermes 3 405B Instruct from OpenRouter costs $1.00 per 1M input tokens and $1.00 per 1M output tokens. Context window 131,072 tokens.

API id nousresearch/hermes-3-llama-3.1-405b · OpenRouter · source · updated 2026-09-25 · general-purpose

$1.00

Input / 1M tokens

$1.00

Output / 1M tokens

—

Cached input / 1M

131K

Context window

Nous: Hermes 3 405B Instruct specifications

Provider: OpenRouter
API id: nousresearch/hermes-3-llama-3.1-405b
Model type: general-purpose
Context window: 131K tokens
Max output: 16K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-09-25

What Nous: Hermes 3 405B Instruct costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.0015
Document summary	50,000	2,000	$0.05
1M tokens in, 200K out	1,000,000	200,000	$1.20

Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.

Common questions

How much does Nous: Hermes 3 405B Instruct cost per 1M tokens?: Nous: Hermes 3 405B Instruct costs $1.00 per 1M input tokens and $1.00 per 1M output tokens on the standard tier.
What is Nous: Hermes 3 405B Instruct's context window?: Nous: Hermes 3 405B Instruct accepts up to 131,072 tokens in a single request, and can return up to 16,384 output tokens.
Is there a cheaper OpenRouter model than Nous: Hermes 3 405B Instruct?: Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $1.00 for Nous: Hermes 3 405B Instruct, with a 16,385 token context window.
Where does this Nous: Hermes 3 405B Instruct price come from?: From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

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