Apertus 8B Instruct vs Grok 4.3
Swiss AI Initiative vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.3 has the higher intelligence index (90.1 vs 25.6)
- •Apertus 8B Instruct is cheaper ($0.10 vs $1.25 per 1M input)
| Apertus 8B Instruct | Grok 4.3 | |
|---|---|---|
| Intelligence index | 25.6 | 90.1 |
| Developer | Swiss AI Initiative | xAI |
| Type | LLM | LLM |
| Access | — | API only |
| Context window | — | 1,000,000 tokens |
| Input price | $0.10 / 1M | $1.25 / 1M |
| Output price | $0.20 / 1M | $2.50 / 1M |
| Speed | — | 88 tok/s |
| Released | September 2, 2025 | May 6, 2026 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |
Shared benchmarks
Apertus 8B Instruct
Grok 4.3
GPQA Diamond
25.6
90.1
Humanity’s Last Exam
5
35