Grok 4.20 0309 vs Solar Open 100B
xAI vs Upstage — benchmarks, pricing, and capabilities side by side.
- •Grok 4.20 0309 has the higher intelligence index (88.5 vs 65.7)
- •Solar Open 100B is cheaper ($0.00 vs $2.00 per 1M input)
| Grok 4.20 0309 | Solar Open 100B | |
|---|---|---|
| Intelligence index | 88.5 | 65.7 |
| 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 | 97 tok/s | — |
| Released | March 10, 2026 | December 17, 2025 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |
Shared benchmarks
Grok 4.20 0309
Solar Open 100B
GPQA Diamond
88.5
65.7
Humanity’s Last Exam
30
9.2