Grok 4.20 0309 v2 vs Solar Pro 2
xAI vs Upstage — benchmarks, pricing, and capabilities side by side.
- •Grok 4.20 0309 v2 has the higher intelligence index (91.1 vs 72.5)
- •Solar Pro 2 is cheaper ($0.00 vs $2.00 per 1M input)
| Grok 4.20 0309 v2 | Solar Pro 2 | |
|---|---|---|
| Intelligence index | 91.1 | 72.5 |
| Developer | xAI | Upstage |
| Type | LLM | LLM |
| Access | — | — |
| Context window | — | — |
| Input price | $2.00 / 1M | $0.00 / 1M |
| Output price | $6.00 / 1M | $0.00 / 1M |
| Speed | 105 tok/s | — |
| Released | April 7, 2026 | May 20, 2025 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |
Shared benchmarks
Grok 4.20 0309 v2
Solar Pro 2
GPQA Diamond
91.1
68.7
Humanity’s Last Exam
32.2
7