Grok 4.3 vs Solar Pro 2
xAI vs Upstage — benchmarks, pricing, and capabilities side by side.
- •Grok 4.3 has the higher intelligence index (90.1 vs 72.5)
- •Solar Pro 2 is cheaper ($0.00 vs $1.25 per 1M input)
| Grok 4.3 | Solar Pro 2 | |
|---|---|---|
| Intelligence index | 90.1 | 72.5 |
| Developer | xAI | Upstage |
| Type | LLM | LLM |
| Access | API only | — |
| Context window | 1,000,000 tokens | — |
| Input price | $1.25 / 1M | $0.00 / 1M |
| Output price | $2.50 / 1M | $0.00 / 1M |
| Speed | 88 tok/s | — |
| Released | May 6, 2026 | May 20, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
Grok 4.3
Solar Pro 2
GPQA Diamond
90.1
68.7
Humanity’s Last Exam
35
7