Head to head
Gemini 3.6 Flash vs Grok 4.5
Which is better, Gemini 3.6 Flash or Grok 4.5?
Gemini 3.6 Flash finishes ahead of Grok 4.5 on the index, 85.1 to 81.3, and leads on all four scores: craft, speed, control and value. Both are scored on the same rubric, in the same week, and neither placing is sponsored.
Updated
Gemini 3.6 Flash
19 of 73
85.1
Frontier answers at Flash speed, with a free tier you can actually build on.
Grok 4.5
39 of 73
81.3
Strong and unusually direct, but two releases behind xAI's current Grok.
The four scores, side by side
| Score | Gemini 3.6 Flash | Grok 4.5 | Difference |
|---|---|---|---|
| Craft | 85 | 81 | +4 |
| Speed | 90 | 82 | +8 |
| Control | 86 | 86 | — |
| Value | 82 | 78 | +4 |
| Index score | 85.1 | 81.3 | +3.8 |
Which to pick
Gemini 3.6 Flash is the safer pick on every axis we score. Grok 4.5 earns its place in the index, but nothing in these four numbers argues for it over Gemini 3.6 Flash.
Gemini 3.6 Flash
Google stopped treating Flash as the budget option and it shows: 3.6 answers quickly, reads images and video natively, and holds its own against models that cost several times more per token. The free tier is generous enough to prototype a real product against, which no other frontier lab currently matches. Steering is the weak spot, with less control exposed than the competition offers.
Where it shines
- Genuinely fast for a model of this quality
- Native video and image understanding, not a bolted-on adapter
- Free tier is large enough to build a prototype against
Grok 4.5
Grok 4.5 was xAI's flagship in the summer, and it still reasons well, answers quickly and is less prone than its rivals to refusing a reasonable request. xAI has since shipped 4.6 and 4.7, and the newer model is both stronger on benchmarks and cheaper on output. It remains on the API for anyone whose work was tuned against it.
Where it shines
- Answers directly instead of hedging
- Fast for a model at this quality level
- Live access to public posts, which no rival ships natively