Apertus 8B Instruct
Summary
Apertus 8B Instruct is an open-weight language model from Swiss AI, released on 2 Sept 2025. It accepts text and generates text, with a 66K-token context window and up to 8K output tokens per response.
Fully open 8B multilingual LLM supporting 1800+ languages with 65K context. Trained on compliant open data. Apache 2.0, EU AI Act compliant.
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Swiss AI |
|---|---|
| Release date | 2 Sept 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [models.dev] |
| Context window | 66K (65,536 tokens) [models.dev] |
| Max output | 8K tokens [models.dev] |
| Knowledge cutoff | Sept 2025 [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | Yes [models.dev] |
Apertus 8B Instruct API pricing by provider
USD per million tokens. Sorted by input price.
We do not currently track a paid API listing for this model.
Frequently asked questions
What is the context window of Apertus 8B Instruct?
Apertus 8B Instruct has a context window of 65,536 tokens (66K) and can generate up to 8,192 tokens in a single response, according to models.dev.
Is Apertus 8B Instruct open source?
Apertus 8B Instruct is an open-weight model. Check the license terms before commercial use.
When was Apertus 8B Instruct released?
Swiss AI released Apertus 8B Instruct on 2 Sept 2025, according to models.dev.
Change history
No changes detected since we started tracking this model. We re-check every source daily.