Key Takeaways
Gemini 3 Flash Preview wins:
- Cheaper input tokens
- Cheaper output tokens
- Larger context window
- Faster response time
- Has reasoning mode
Grok 4 wins:
- Higher intelligence benchmark
- Better at coding
- Better at math
Price Advantage
Gemini 3 Flash Preview
Benchmark Advantage
Grok 4
Context Window
Gemini 3 Flash Preview
Speed
Gemini 3 Flash Preview
Pricing Comparison
Price Comparison
| Metric | Gemini 3 Flash Preview | Grok 4 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.50 | $3.00 | Gemini 3 Flash Preview |
| Output (per 1M tokens) | $3.00 | $15.00 | Gemini 3 Flash Preview |
| Cache Read (per 1M) | $50000.00 | $750000.00 | Gemini 3 Flash Preview |
| Cache Write (per 1M) | $83300.00 | N/A | Gemini 3 Flash Preview |
Using a 3:1 input/output ratio, Gemini 3 Flash Preview is 81% cheaper overall.
Gemini 3 Flash Preview Providers
Google AI Studio $0.50 (Cheapest)
Google $0.50 (Cheapest)
Grok 4 Providers
Vercel $3.00 (Cheapest)
xAI $3.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
1
Gemini 3 Flash Preview Wins
5
Grok 4 Wins
Benchmark Scores
| Benchmark | Gemini 3 Flash Preview | Grok 4 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 35.1 | 41.4 | |
Coding Index Code generation & understanding | 37.8 | 40.5 | |
Math Index Mathematical reasoning | 55.7 | 92.7 | |
MMLU Pro Academic knowledge | 88.2 | 86.6 | |
GPQA Graduate-level science | 81.2 | 87.7 | |
LiveCodeBench Competitive programming | 79.7 | 81.9 | |
Aider Real-world code editing | - | 79.6 | - |
AIME Competition math | - | 94.3 | - |
Grok 4 shows stronger mathematical reasoning abilities.
Cost vs Quality
X-axis:
Y-axis:
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Gemini 3 Flash Preview
Other models
Context & Performance
Context Window
Gemini 3 Flash Preview
1,048,576
tokens
Max output: 65,535 tokens
Grok 4
256,000
tokens
Gemini 3 Flash Preview has a 76% larger context window.
Speed Performance
| Metric | Gemini 3 Flash Preview | Grok 4 | Winner |
|---|---|---|---|
| Tokens/second | 174.5 tok/s | 37.4 tok/s | |
| Time to First Token | 0.93s | 10.22s |
Gemini 3 Flash Preview responds 367% faster on average.
Capabilities
Feature Comparison
| Feature | Gemini 3 Flash Preview | Grok 4 |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Gemini 3 Flash Preview | Grok 4 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Xai | |
| Released | Dec 2025 | Jul 2025 |
Gemini 3 Flash Preview Modalities
Input
textimagefileaudiovideo
Output
text
Grok 4 Modalities
Input
imagetext
Output
text