Hermes 4 405B API
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 DevPass (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
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 DevPass (LLM Gateway) costs $1.00 per 1M input tokens and $3.00 per 1M output tokens.
Model Details
ID
hermes-4-405b
Provider
DevPass (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