Grok 4.20 0309 vs o3
xAI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.20 0309 has the higher intelligence index (88.5 vs 71.6)
- •Grok 4.20 0309 is faster
| Grok 4.20 0309 | o3 | |
|---|---|---|
| Intelligence index | 88.5 | 71.6 |
| Developer | xAI | OpenAI |
| Type | LLM | LLM |
| Access | — | API only |
| Context window | — | 200,000 tokens |
| Input price | $2.00 / 1M | $2.00 / 1M |
| Output price | $6.00 / 1M | $8.00 / 1M |
| Speed | 97 tok/s | 50 tok/s |
| Released | March 10, 2026 | April 16, 2025 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |
Shared benchmarks
Grok 4.20 0309
o3
GPQA Diamond
88.5
87.7
Humanity’s Last Exam
30
24.3