Apertus 70B Instruct vs GPT-5.1
Swiss AI Initiative vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 27.2)
- •Apertus 70B Instruct is cheaper ($0.80 vs $1.25 per 1M input)
| Apertus 70B Instruct | GPT-5.1 | |
|---|---|---|
| Intelligence index | 27.2 | 89 |
| Developer | Swiss AI Initiative | OpenAI |
| Type | LLM | LLM |
| Access | — | API only |
| Context window | — | 400,000 tokens |
| Input price | $0.80 / 1M | $1.25 / 1M |
| Output price | $2.90 / 1M | $10.00 / 1M |
| Speed | — | 115 tok/s |
| Released | September 2, 2025 | November 12, 2025 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |
Shared benchmarks
Apertus 70B Instruct
GPT-5.1
GPQA Diamond
27.2
88.1
Humanity’s Last Exam
5.5
26.5