Grok 4.3 vs Kimi K2 0905
xAI vs Moonshot AI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.3 has the higher intelligence index (90.1 vs 71)
- •Kimi K2 0905 is cheaper ($0.60 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 0905 | |
|---|---|---|
| Intelligence index | 90.1 | 71 |
| Developer | xAI | Moonshot AI |
| Type | LLM | LLM |
| Access | API only | API only |
| Context window | 1,000,000 tokens | 262,144 tokens |
| Input price | $1.25 / 1M | $0.60 / 1M |
| Output price | $2.50 / 1M | $2.50 / 1M |
| Speed | 88 tok/s | 16 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 0905
GPQA Diamond
90.1
75.8
Humanity’s Last Exam
35
6.3