Apertus V1.1 0.5B is an open-source language model by swiss-ai. Features: 0.5b LLM, VRAM: 0.9GB, Context: 4K, License: apache-2.0, LLM Explorer Score: 0.26.
Arxiv:2509.14233 Arxiv:2605.29128 Apertus Compliant Endpoints compatible Multilingual Region:us Safetensors Swiss-ai
Model Card on HF 🤗: https://huggingface.co/swiss-ai/Apertus-v1.1-0.5B
Apertus V1.1 0.5B 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 0.5B Parameters and Internals
| LLM Name | Apertus V1.1 0.5B |
| Repository 🤗 | https://huggingface.co/swiss-ai/Apertus-v1.1-0.5B |
| Model Size | 0.5b |
| Required VRAM | 0.9 GB |
| Updated | 2026-07-02 |
| Maintainer | swiss-ai |
| Model Type | apertus |
| Model Files | |
| Model Architecture | ApertusForCausalLM |
| License | apache-2.0 |
| Context Length | 4096 |
| Model Max Length | 4096 |
| Transformers Version | 4.57.6 |
| Tokenizer Class | PreTrainedTokenizerFast |
| Vocabulary Size | 131072 |
Best Alternatives to Apertus V1.1 0.5B
Best Alternatives |
Context / RAM |
Downloads |
Likes |
|---|---|---|---|
| Apertus V1.1 0.5B Instruct | 4K / 1.1 GB | 251 | 1 |
Note: green Score (e.g. "73.2") means that the model is better than swiss-ai/Apertus-v1.1-0.5B .
Rank the Apertus V1.1 0.5B Capabilities
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Original data from HuggingFace, OpenCompass and various public git repos.
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Release v20260328a