Apertus-8B-Instruct-2509

apache-2.08.1B
Context
66K
Snapshotsswiss-ai/Apertus-8B-Instruct-2509

Capabilities

Reasoning & Interaction
Tool Calling
Infrastructure
Streaming
Fine-tuning

Details

Model IDswiss-ai/Apertus-8B-Instruct
Provider Hugging Face
Creator swiss-ai
Family—
Licenseapache-2.0
Status—
Type—
Input modalities—
Output modalities—
Open weightYes
Parameters8.1B
Architecturetransformer
Context window66K tokens
Max input—
Max output—
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

API

GET/v1/models/huggingface/swiss-ai/Apertus-8B-Instruct

Apertus-8B-Instruct-2509

swiss-ai/Apertus-8B-Instruct
swiss-ai/Apertus-8B-Instruct-2509
Changes · 4 entries
swiss-ai/Apertus-8B-Instructupdate6231fb5Apr 22, 2026, 02:50 AM
parameters8→8.1
swiss-ai/Apertus-8B-Instructupdate1cd659eMar 24, 2026, 04:19 AM
capabilitiesfine tuningyes
swiss-ai/Apertus-8B-Instructupdate2b100acMar 23, 2026, 05:30 AM
capabilitiestool callyes
parameters8
page_urlhttps://huggingface.co/swiss-ai/Apertus-8B-Instruct-2509
release_date2025-08-13
context_window65536
licenseapache-2.0
architecturetransformer
open_weightyes
tools["function_calling"]
swiss-ai/Apertus-8B-Instructcreate7f5c66fMar 21, 2026, 05:16 AM