Apertus V1.1 4B Instruct is an open-source language model by swiss-ai. Features: 4b LLM, VRAM: 7.7GB, Context: 4K, License: apache-2.0, Instruction-Based, LLM Explorer Score: 0.26.
Arxiv:2509.14233 Arxiv:2605.29128 Apertus Base model:finetune:swiss-ai/a... Base model:swiss-ai/apertus-v1... Compliant Conversational Endpoints compatible Instruct Multilingual Region:us Safetensors Sharded Swiss-ai Tensorflow
Model Card on HF 🤗: https://huggingface.co/swiss-ai/Apertus-v1.1-4B-Instruct
Apertus V1.1 4B Instruct Benchmarks
nn.n% — How the model compares to the reference models: Anthropic Sonnet 3.5 ("so35"), GPT-4o ("gpt4o") or GPT-4 ("gpt4").
What is the LLM Explorer Rank (Score)
Apertus V1.1 4B Instruct Parameters and Internals
| LLM Name | Apertus V1.1 4B Instruct |
| Repository 🤗 | https://huggingface.co/swiss-ai/Apertus-v1.1-4B-Instruct |
| Base Model(s) | |
| Model Size | 4b |
| Required VRAM | 7.7 GB |
| Updated | 2026-06-21 |
| Maintainer | swiss-ai |
| Model Type | apertus |
| Instruction-Based | Yes |
| Model Files | |
| Model Architecture | ApertusForCausalLM |
| License | apache-2.0 |
| Context Length | 4096 |
| Model Max Length | 4096 |
| Transformers Version | 4.57.6 |
| Tokenizer Class | PreTrainedTokenizerFast |
| Padding Token | <pad> |
| Vocabulary Size | 131072 |
Rank the Apertus V1.1 4B Instruct Capabilities
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Original data from HuggingFace, OpenCompass and various public git repos.
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Release v20260328a