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LLM Gateway

Hermes 4 405B API

LLM Gateway
About

Build advanced reasoning agents with Hermes 4 405B, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.00/1M input and $3.00/1M output tokens, native tool calling support. Access Hermes 4 405B via the LLM Gateway API with up to 131K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
131K

Tokens

Input Limit
131K

Tokens

Max Output
131K

Tokens

Pricing

Standard (per 1M tokens)

Input
$1.00
Output
$3.00
Frequently Asked Questions

Hermes 4 405B by LLM Gateway costs $1.00 per 1M input tokens and $3.00 per 1M output tokens.

Model Details
ID
hermes-4-405b
Provider
LLM Gateway
Family
hermes
Release Date
Aug 26, 2025
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
LLMGATEWAY_API_KEY
API Base URL
https://api.llmgateway.io/v1
Documentation