Hermes 3 405B - Kyma API

Overview

Nous Research’s fine-tune of Llama 3.1 405B, tuned for steerability rather than refusal: it follows a system prompt further than the Instruct model it is built on, which is why roleplay, persona and agent-scaffold work keep reaching for it. Reliable function calling and structured output are part of the tune, not bolted on.

Specs

Field	Value
Model ID	`hermes-3-405b`
Best for	Steerable assistants, persona work, structured output
Context window	131,072
Max output tokens	8K
Input modalities	Text
Output modalities	Text
Tool calling	Yes
Structured outputs	Yes
Prompt caching	No
Vision	No
Reasoning	No
Speed	Medium
Cost band	Balanced
Release stage	Stable

Pricing

	Per 1M tokens
Input	$1.35
Output	$1.35

Example

from openai import OpenAI

client = OpenAI(base_url="https://kymaapi.com/v1", api_key="kyma-...")

response = client.chat.completions.create(
    model="hermes-3-405b",
    messages=[{"role": "user", "content": "..."}],
    tools=[...],  # function calling supported
)

Agent query example

Ask the API which models fit, instead of hardcoding an id:

curl "https://kymaapi.com/v1/models?recommended_for=chat&tools=true&quality_tier=frontier-open"

​Overview

​Specs

​Pricing

​Example

​Agent query example

Overview

Specs

Pricing

Example

Agent query example