Hermes 3 405B Instruct API

Hermes 3 405B Instruct on AIMLAPI.

Modalities
Image, TextText
In / Out price
$1.06/$1.06per 1M
Context window
128K tokens
Released
Aug 16, 2024

Hermes 3 405B Instruct overview

Hermes 3 405B Instruct specs

Model ID
nousresearch/hermes-3-llama-3.1-405b
Developer
NousResearch
Context window
131,072 tokens
Max output
16,384 tokens
Input
Image, Text
Output
Text
API
OpenAI-compatible, base URL https://api.aimlapi.com/v1

What is Hermes 3 405B Instruct API?

Where to Use Hermes 3 405B Instruct

Coding and code review
Generate, debug, and review code across languages, reading whole files or repos in a single prompt.

Agentic and multi-step workflows
Reliable tool-calling and instruction-following suit agent loops that plan, call tools, and iterate.

Use cases

Hermes 3 405B Instruct is documented as well-suited for interactive, multi-turn conversations and roleplaying, with emphasis on maintaining coherent and contextually relevant dialogue. It is also described as a valuable tool for software development and code analysis, including agentic coding generation and implementation planning.

The model is additionally suited to agentic applications and workflow automation, including multi-step tool use. It is also recommended for complex reasoning tasks such as logic puzzles, mathematical problems, and analysis.

Capabilities

  • Function calling
  • Reasoning
  • Streaming
  • Structured outputs
  • Web search

Hermes 3 405B Instruct API pricing

Hermes 3 405B Instruct pricing in US dollars
UsagePriceUnit
Input$1.061M tokens
Output$1.061M tokens

Prices from the AI/ML API price list, checked on Nov 4, 2026.

Hermes 3 405B Instruct vs other models: token prices

AI/ML API input and output rates for 5 models, per million tokens.

AI/ML API model prices in USD per million tokens
ModelInputOutput
Hermes 3 405B Instruct$1.06$1.06
Hermes 3 70B Instruct$0.7406$0.7406
DeepSeek V3.1$0.2857$1.06
DeepSeek-V3.1 Terminus$0.2857$1.06
Hermes 4 405B$1.06$3.17

How to use the Hermes 3 405B Instruct API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "nousresearch/hermes-3-llama-3.1-405b",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'

Related articles

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Hermes 3 405B Instruct FAQ

What is the context window of Hermes 3 405B Instruct?

Hermes 3 405B Instruct has a 131,072 tokens context window and can return up to 16,384 tokens.

What inputs and outputs does Hermes 3 405B Instruct support?

Hermes 3 405B Instruct takes image, text as input and returns text.

What is the model ID for Hermes 3 405B Instruct?

Use nousresearch/hermes-3-llama-3.1-405b as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

How much does Hermes 3 405B Instruct cost?

Hermes 3 405B Instruct costs $1.06 input and $1.06 output per 1M tokens on AI/ML API, billed as you go with no subscription.

Does Hermes 3 405B Instruct support streaming?

Yes, Hermes 3 405B Instruct can stream responses as they are generated.

Can Hermes 3 405B Instruct read images?

Yes, Hermes 3 405B Instruct accepts image input alongside text.

Who created Hermes 3 405B Instruct?

Hermes 3 405B Instruct was built by NousResearch.

Can Hermes 3 405B Instruct call external functions or tools?

Yes, it supports function calling along with parallel tool calls and tool use.

Start building with Hermes 3 405B Instruct

Hermes 3 405B Instruct API

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

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "nousresearch/hermes-3-llama-3.1-405b",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'