Head to head
Gemini 3.6 Flash vs Grok 4.5
Gemini 3.6 Flash (Google) and Grok 4.5 (xAI) compared on intelligence, speed, context, and price — and which to choose. Both run on just4o.chat from one chat.
| Metric | Gemini 3.6 Flash | Grok 4.5 |
|---|---|---|
| Intelligence (AA index) | — | — |
| Output speed (tokens/sec) | — | — |
| Context window | 1.0M ✓ | 500K |
| Max output | 66K | — |
| Input price / 1M | $1.5 ✓ | $2 |
| Output price / 1M | $7.5 | $6 ✓ |
| Released | 2026-07-21 | 2026-07-08 |
Choose Gemini 3.6 Flash if you want…
- Larger context window (1.0M)
Choose Grok 4.5 if you want…
- A comparable all-rounder — they trade blows on the headline metrics.
FAQ
Which is better, Gemini 3.6 Flash or Grok 4.5?
Gemini 3.6 Flash leads on 1 of the headline metrics (larger context window (1.0m)), while Grok 4.5 wins on other factors. The right pick depends on whether you prioritise capability, speed, or cost.
Is Gemini 3.6 Flash or Grok 4.5 cheaper?
Gemini 3.6 Flash is cheaper at $3 per 1M tokens (blended), versus $3.
Can I use both Gemini 3.6 Flash and Grok 4.5?
Yes. Both are available on just4o.chat from a single chat — you can switch between them per message with no separate subscriptions.