Fully open 8B multilingual LLM supporting 1800+ languages with 65K context. Trained on compliant open data. Apache 2.0, EU AI Act compliant.
- Context
- 66K
- Released
- 1y ago
- Parameters
- 8B
Sources:models.dev
Benchmarks
DeepSWE is the primary coding benchmark where an exact model evaluation exists. Other sourced evaluations appear below; missing scores are not zero.
Not evaluated in DeepSWE 1.1 as of 2026-09-22. Results are only shown for exact model versions in the official dataset. Official leaderboard.
No benchmark results have been matched to this model yet.
Specifications
- Developer
- Swiss AI
- Model family
- —
- Type
- Language model
- Predecessor
- —
- Successor
- —
- Released
- September 2, 2025
- Model ID
swiss-ai/apertus-8b- Openness
- Open weights
- License
- Apache-2.0
- Parameters
- 8B
- Input modalities
- text
- Output modalities
- text
- Modality
- text->text
- Max output tokens
- 8K
- Knowledge cutoff
- 2025-09
- Hugging Face
- —
- Source freshness
- Metadata synced Oct 8, 2026, 10:17 PM UTC
Additional source evidence
- Source model
- swiss-ai/apertus-8b
- Last updated
- 2025-09-02
- Knowledge cutoff
- 2025-09
- Model context
- 66K
- Model output limit
- 8K
- Open weights
- Yes
- File attachments
- No
- Reasoning
- No
- Tool calling
- Yes
- Temperature control
- Yes
Downloadable weights
Official references
Complete source record (JSON)
{
"id": "swiss-ai/apertus-8b",
"name": "Apertus 8B",
"description": "Fully open 8B multilingual LLM supporting 1800+ languages with 65K context. Trained on compliant open data. Apache 2.0, EU AI Act compliant.",
"last_updated": "2025-09-02",
"knowledge": "2025-09",
"attachment": false,
"reasoning": false,
"tool_call": true,
"temperature": true,
"modalities": {
"input": [
"text"
],
"output": [
"text"
]
},
"limit": {
"context": 65536,
"output": 8192
},
"release_date": "2025-09-02",
"open_weights": true,
"license": "Apache-2.0",
"links": [
{
"url": "https://arxiv.org/abs/2509.14233",
"label": "Paper",
"type": "paper"
}
],
"weights": [
{
"label": "Hugging Face",
"url": "https://huggingface.co/swiss-ai/Apertus-8B-Instruct-2509"
}
]
}Infrastructure
Provider availability
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Deployment graph
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