Grok 4.3 vs Solar Pro 3
xAI vs Upstage — benchmarks, pricing, and capabilities side by side.
- •Grok 4.3 has the higher intelligence index (90.1 vs 72.4)
- •Solar Pro 3 is cheaper ($0.15 vs $1.25 per 1M input)
- •Grok 4.3 has a larger context window (1M)
| Grok 4.3 | Solar Pro 3 | |
|---|---|---|
| Intelligence index | 90.1 | 72.4 |
| Developer | xAI | Upstage |
| Type | LLM | LLM |
| Access | API only | API only |
| Context window | 1,000,000 tokens | 128,000 tokens |
| Input price | $1.25 / 1M | $0.15 / 1M |
| Output price | $2.50 / 1M | $0.60 / 1M |
| Speed | 88 tok/s | — |
| Released | May 6, 2026 | January 27, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
Shared benchmarks
Grok 4.3
Solar Pro 3
GPQA Diamond
90.1
72.4
Humanity’s Last Exam
35
10.1