Nous Research: Hermes 4 405B

Public pricingIntelligence 79/100Medium memoryDiep redenerenToolgebruik

Nous: Hermes 4 405B is een tekst-model voor redeneren en probleemoplossing. Het combineert diep redeneren en plannen, een context van 131K tokens en een evenwichtig geprijsd-profiel voor betrouwbaar werk in reasoning, analysis, and hard problem solving.

Input

$1.00/1M

Output

$3.00/1M

Cached

$0.05/1M

Batch

$0.25/1M

Calculate your Hermes 4 405B bill.

Set your workload — see cost at your exact volume.

What would Hermes 4 405B cost you?

Adjust the workload to see your monthly bill.

1,00010,00050,000250,0001M10M

Technical specifications

Hermes 4 405B at a glance.

Memory

131,072

tokens

Max reply

32,768

tokens

Memory tier

Medium

a long report or a codebase file

Tokenizer

—

Released

Aug 2025

Training cutoff

Dec 2024

Availability

Public pricing

Status

active

What it can do

Capabilities & limits.

  • Understands images
  • Deep step-by-step thinking
  • Uses tools / calls functions
  • Strict JSON output
  • Streams replies
  • Fine-tunable on your data

When to pick Hermes 4 405B

  • Multi-step reasoning, research agents, or hard math.
  • Agentic workflows that call tools or APIs.

When to look elsewhere

  • Your workload involves images — pick a vision-capable model instead.

Alternatives

Similar models to compare.

FAQ

Hermes 4 405B — the questions we see most.

Pricing, capabilities, alternatives — generated from the same data that powers the calculator above.

Get instant answers from our AI agent

At a typical workload of 50,000 conversations a month with 1,500-token prompts and 800-token replies, Hermes 4 405B costs roughly $195 per month. Input is $1.00 /1M tokens and output is $3.00 /1M tokens.
Hermes 4 405B has a 131,072-token context window (medium memory — a long report or a codebase file). That means you can fit about 24,576 words of input and history in a single call.
Beyond text generation, Hermes 4 405B supports deep step-by-step reasoning, calling functions / tools, strict JSON output, fine-tuning on your own data. It streams replies by default.
Hermes 4 405B was released in August 2025, with training data cut off around December 2024.
Models in a similar class include Hermes 4 70B, Claude Haiku 4.5, MiMo-V2-Pro. The "Similar models" section below this FAQ links into each.

Still unsure?

Compare Hermes 4 405B against 100+ other models.

Open the full wizard — pick a use case, set your usage, and see side-by-side monthly costs in under a minute.

Open the comparison wizard