Grok 4.20 0309 vs JT-35B-Flash
xAI vs China Mobile — benchmarks, pricing, and capabilities side by side.
- •Grok 4.20 0309 has the higher intelligence index (88.5 vs 82.9)
- •JT-35B-Flash is cheaper ($0.00 vs $2.00 per 1M input)
| Grok 4.20 0309 | JT-35B-Flash | |
|---|---|---|
| Intelligence index | 88.5 | 82.9 |
| Developer | xAI | China Mobile |
| Type | LLM | LLM |
| Access | — | — |
| Context window | — | — |
| Input price | $2.00 / 1M | $0.00 / 1M |
| Output price | $6.00 / 1M | $0.00 / 1M |
| Speed | 97 tok/s | — |
| Released | March 10, 2026 | May 14, 2026 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |
Shared benchmarks
Grok 4.20 0309
JT-35B-Flash
GPQA Diamond
88.5
82.9
Humanity’s Last Exam
30
6.1