Gemini 3.5 Flash vs Grok 4.1 Fast
Google vs xAI — benchmarks, pricing, and capabilities side by side.
- •Gemini 3.5 Flash has the higher intelligence index (92.2 vs 85.6)
- •Grok 4.1 Fast is cheaper ($0.00 vs $1.50 per 1M input)
| Gemini 3.5 Flash | Grok 4.1 Fast | |
|---|---|---|
| Intelligence index | 92.2 | 85.6 |
| Developer | xAI | |
| Type | Multimodal | LLM |
| Access | API only | — |
| Context window | 1,048,576 tokens | — |
| Input price | $1.50 / 1M | $0.00 / 1M |
| Output price | $9.00 / 1M | $0.00 / 1M |
| Speed | 221 tok/s | — |
| Released | May 19, 2026 | November 19, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | — |
| Output modalities | Text | — |
Shared benchmarks
Gemini 3.5 Flash
Grok 4.1 Fast
GPQA Diamond
92.2
85.3
Humanity’s Last Exam
41
17.6