Gemini 3.5 Flash vs Grok 4.20 0309 v2
Google vs xAI — benchmarks, pricing, and capabilities side by side.
- •Gemini 3.5 Flash has the higher intelligence index (92.2 vs 91.1)
- •Gemini 3.5 Flash is cheaper ($1.50 vs $2.00 per 1M input)
- •Gemini 3.5 Flash is faster
| Gemini 3.5 Flash | Grok 4.20 0309 v2 | |
|---|---|---|
| Intelligence index | 92.2 | 91.1 |
| Developer | xAI | |
| Type | Multimodal | LLM |
| Access | API only | — |
| Context window | 1,048,576 tokens | — |
| Input price | $1.50 / 1M | $2.00 / 1M |
| Output price | $9.00 / 1M | $6.00 / 1M |
| Speed | 221 tok/s | 105 tok/s |
| Released | May 19, 2026 | April 7, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | — |
| Output modalities | Text | — |
Shared benchmarks
Gemini 3.5 Flash
Grok 4.20 0309 v2
GPQA Diamond
92.2
91.1
Humanity’s Last Exam
41
32.2