Apertus-8B-Instruct-2509

Open-weights 8.05B-parameter text model from swiss-ai on Hugging Face (apache-2.0).

IndexedApache-2.0

Install

Pick your client. Read the repository before you give any tool access to your data.

huggingface-cli download swiss-ai/Apertus-8B-Instruct-2509

Get the weekly diff

The weekly diff: one email a week with new agent tools, notable updates and grade changes, plus security alerts for tools you follow. Double opt-in, one-click unsubscribe.

About

swiss-ai/Apertus-8B-Instruct-2509 is an open-weights text-generation model published on Hugging Face by swiss-ai. It has about 8.05 billion parameters. It is based on swiss-ai/Apertus-8B-2509. License: apache-2.0. 420,690 downloads in the last 30 days.

Use cases: model-inference

Reviews

Write a review

No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Price and limits

Not offered through OpenRouter. Download the weights and run it yourself, or use a host that serves it.

Provider: swiss-ai
Model id: swiss-ai/Apertus-8B-Instruct-2509
Input: text
Output: text
Tool calling: Not listed
Weights: Open: swiss-ai/Apertus-8B-Instruct-2509
License: apache-2.0
Parameters: 8.05B
Base model: swiss-ai/Apertus-8B-2509
Downloads: 420,690 in the last 30 days (Hugging Face)
Released: Aug 13, 2025

Signals

Hugging Face likes: 499
Last release: Jul 17, 2026 (3 months ago)

From Hugging Face.

Details

License: Apache-2.0
Website: huggingface.co/swiss-ai/Apertus-8B-Instruct-2509
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: Hugging Face

Cite this page

Apertus-8B-Instruct-2509: price, context window, tool use. Agent Mart. https://agentmart.dev/models/swiss-ai-apertus-8b-instruct-2509 (last updated 2026-10-24)