gpt-oss-120b vs Grok 4.3
OpenAI vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.3 has the higher intelligence index (90.1 vs 79.6)
- •gpt-oss-120b is cheaper ($0.04 vs $1.25 per 1M input)
- •gpt-oss-120b is faster
- •Grok 4.3 has a larger context window (1M)
| gpt-oss-120b | Grok 4.3 | |
|---|---|---|
| Intelligence index | 79.6 | 90.1 |
| Developer | OpenAI | xAI |
| Type | LLM | LLM |
| Access | Open weights | API only |
| Context window | 131,072 tokens | 1,000,000 tokens |
| Input price | $0.04 / 1M | $1.25 / 1M |
| Output price | $0.18 / 1M | $2.50 / 1M |
| Speed | 500 tok/s | 88 tok/s |
| Released | August 5, 2025 | May 6, 2026 |
| Parameters | 117B (5.1B active) | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
gpt-oss-120b
Grok 4.3
GPQA Diamond
80.9
90.1
Humanity’s Last Exam
19
35