Gemini 3 Flash vs Grok 4 Fast: Specs & Benchmark Comparison
| Characteristic | Gemini 3 Flash | Grok 4 Fast |
|---|---|---|
| Company | xAI | |
| Release Date | December 16, 2025 | August 27, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 2.0M |
| Context (output) | 66K | 30K |
| Input Price / 1M | $0.50 | $0.20 |
| Output Price / 1M | $3.00 | $0.50 |
| Average Score | 0.9 | 0.8 |
| Benchmarks | ||
| AIME 2025 | 1.0 | 0.9 |
| GPQA | 0.9 | 0.9 |
Visual Benchmark Comparison
Gemini 3 Flash
Grok 4 Fast
AIME 20251.0 vs 0.9
1.0
0.9
GPQA0.9 vs 0.9
0.9
0.9
Verdict
Grok 4 Fast leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Gemini 3 Flash — 0.9, Grok 4 Fast — 0.8.
API Cost
Grok 4 Fast is 5.0x cheaper: input $0.20/1M vs $0.50/1M tokens.
Context Window
Grok 4 Fast supports a larger context: 2M vs 1M tokens.
Recency
Gemini 3 Flash is newer: released 12/16/2025 vs 8/27/2025.
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Frequently Asked Questions
Which is better for coding — Gemini 3 Flash or Grok 4 Fast?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Gemini 3 Flash or Grok 4 Fast?
Grok 4 Fast is cheaper for input: $0.20 per 1M tokens vs $0.50.
Which has a larger context window — Gemini 3 Flash or Grok 4 Fast?
Grok 4 Fast supports a larger context: 2,000,000 tokens vs 1,048,576.
The Gemini 3 Flash and Grok 4 Fast comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Gemini 3 Flash or Grok 4 Fast page. See also the complete list of AI model comparisons.