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Favicon for nousresearch

Nous: Hermes 3 405B Instruct

nousresearch/hermes-3-llama-3.1-405b

Model weights
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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 the board.

Hermes 3 405B is a frontier-level, full-parameter finetune of the Llama-3.1 405B foundation model, focused on aligning LLMs to the user, with powerful steering capabilities and control given to the end user.

The Hermes 3 series builds and expands on the Hermes 2 set of capabilities, including more powerful and reliable function calling and structured output capabilities, generalist assistant capabilities, and improved code generation skills.

Hermes 3 is competitive, if not superior, to Llama-3.1 Instruct models at general capabilities, with varying strengths and weaknesses attributable between the two.

Modalities

In / Out Price

$1 / $1per 1M

Context

131K

Released

Aug 16, 2024

Knowledge Cutoff

Dec 2023

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ProvidersPricingPerformanceUptimeBenchmarksAppsActivityFAQ

Providers

This model is hosted by one provider. OpenRouter forwards every request to it directly — no routing decisions to make.

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations. Higher percentages are better — and rank percentile shows where this model lands among all models on OpenRouter.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

Quick Start

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

About Nous: Hermes 3 405B Instruct

OpenRouter makes Nous: Hermes 3 405B Instruct by Nous Research available through a unified, OpenAI-compatible API using the model ID nousresearch/hermes-3-llama-3.1-405b. It is served by DeepInfra.

Nous: Hermes 3 405B Instruct accepts text and returns text. It has a 131,072-token context window and a maximum output of 16,384 tokens.

On OpenRouter, Nous: Hermes 3 405B Instruct costs $1.00/M input tokens and $1.00/M output tokens. It was released on August 16, 2024; its knowledge cutoff is December 31, 2023.

More models from Nous Research

  • Hermes 4 70B
  • Hermes 4 405B
  • Hermes 3 70B Instruct

Frequently asked questions

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 the board.

Hermes 3 405B Instruct costs $1.00/M input tokens and $1.00/M output tokens.

Hermes 3 405B Instruct has a 131,072 token context window. It supports up to 16,384 completion tokens.

The Hermes 3 405B Instruct endpoint shown on this page does not accept tools, so function calling is unavailable there. It also supports structured outputs via a JSON schema in response_format.

Hermes 4 70B, Hermes 4 405B and Hermes 3 70B Instruct are other text models from Nous Research.

Hermes 3 405B Instruct was released on August 16, 2024. Its knowledge cutoff is December 31, 2023.

$1.00$1.000.26s20 tps
100.00%

Throughput

20tok/s

P50, best across providers

Latency

0.26s

P50, best provider

Uptime (3d)

100.00%

Availability (3d)

99.52%

Availability over the last 3 days

Last 72 hours
Availability 99.52%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
98.79%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.

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