Grok 4.3 vs Kimi K2
xAI vs Moonshot AI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.3 has the higher intelligence index (90.1 vs 73.6)
- •Kimi K2 is cheaper ($0.57 vs $1.25 per 1M input)
- •Grok 4.3 is faster
- •Grok 4.3 has a larger context window (1M)
| Grok 4.3 | Kimi K2 | |
|---|---|---|
| Intelligence index | 90.1 | 73.6 |
| Developer | xAI | Moonshot AI |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 1,000,000 tokens | 131,072 tokens |
| Input price | $1.25 / 1M | $0.57 / 1M |
| Output price | $2.50 / 1M | $2.30 / 1M |
| Speed | 88 tok/s | 26 tok/s |
| Released | May 6, 2026 | July 11, 2025 |
| Parameters | — | 1T (32B active) |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
Shared benchmarks
Grok 4.3
Kimi K2
GPQA Diamond
90.1
76.6
Humanity’s Last Exam
35
7