GPT-5 mini 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 79.2)
- •GPT-5 mini is cheaper ($0.25 vs $2.00 per 1M input)
- •GPT-5 mini is faster
| GPT-5 mini | Grok 4.20 0309 | |
|---|---|---|
| Intelligence index | 79.2 | 88.5 |
| Developer | OpenAI | xAI |
| Type | LLM | LLM |
| Access | API only | — |
| Context window | 400,000 tokens | — |
| Input price | $0.25 / 1M | $2.00 / 1M |
| Output price | $2.00 / 1M | $6.00 / 1M |
| Speed | 200 tok/s | 97 tok/s |
| Released | August 7, 2025 | March 10, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5 mini
Grok 4.20 0309
GPQA Diamond
82.3
88.5
Humanity’s Last Exam
16.7
30