Grok-1.5 vs Grok 4.20 0309
xAI vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.20 0309 has the higher intelligence index (88.5 vs 50.3)
| Grok-1.5 | Grok 4.20 0309 | |
|---|---|---|
| Intelligence index | 50.3 | 88.5 |
| Developer | xAI | xAI |
| Type | LLM | LLM |
| Access | API only | — |
| Context window | — | — |
| Input price | — | $2.00 / 1M |
| Output price | — | $6.00 / 1M |
| Speed | — | 97 tok/s |
| Released | March 28, 2024 | March 10, 2026 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |
Shared benchmarks
Grok-1.5
Grok 4.20 0309
GPQA Diamond
35.9
88.5