Grok 4.3 vs Kimi K2-Instruct-0905
xAI vs Moonshot AI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.3 has the higher intelligence index (90.1 vs 66)
| Grok 4.3 | Kimi K2-Instruct-0905 | |
|---|---|---|
| Intelligence index | 90.1 | 66 |
| Developer | xAI | Moonshot AI |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 1,000,000 tokens | — |
| Input price | $1.25 / 1M | — |
| Output price | $2.50 / 1M | — |
| Speed | 88 tok/s | — |
| Released | May 6, 2026 | September 5, 2025 |
| Parameters | — | 1000000000000 |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
Grok 4.3
Kimi K2-Instruct-0905
GPQA Diamond
90.1
75.1
Humanity’s Last Exam
35
4.7