GPT-5.4 vs Grok 4.20 0309
OpenAI vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.20 0309 has the higher intelligence index (88.5 vs 74.9)
- •Grok 4.20 0309 is cheaper ($2.00 vs $2.50 per 1M input)
- •Grok 4.20 0309 is faster
| GPT-5.4 | Grok 4.20 0309 | |
|---|---|---|
| Intelligence index | 74.9 | 88.5 |
| Developer | OpenAI | xAI |
| Type | LLM | LLM |
| Access | API only | — |
| Context window | 1,050,000 tokens | — |
| Input price | $2.50 / 1M | $2.00 / 1M |
| Output price | $15.00 / 1M | $6.00 / 1M |
| Speed | 84 tok/s | 97 tok/s |
| Released | March 5, 2026 | March 10, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.4
Grok 4.20 0309
GPQA Diamond
92
88.5
Humanity’s Last Exam
41.6
30