Gemini 3 Flash Preview vs Grok 4.3
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Gemini 3 Flash Preview vs Grok 4.3: side by side
| Spec | Gemini 3 Flash Preview | Grok 4.3 | Winner |
|---|---|---|---|
| Intelligence | 46.4 | 43.9 | Gemini 3 Flash Preview |
| Output speed | 188 t/s | 135 t/s | Gemini 3 Flash Preview |
| Output price | $3.00/1M | $2.50/1M | Grok 4.3 |
| Context | 1049K | 1000K | Gemini 3 Flash Preview |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | xAI | Tie |
Gemini 3 Flash Preview
Pros
- +Broad native support for text, image, audio, video and files
- +Efficient handling of very large contexts
- +Fast inference suitable for preview use
Cons
- –Preview status may include occasional instability
- –Reasoning depth can be shallower than full-scale models
- –No native tool-use or external browsing mentioned
Grok 4.3
Pros
- +Strong performance on complex multi-step reasoning
- +Large context window for document-level tasks
- +Helpful and direct response style
- +Integrated real-time tool access
Cons
- –Vision capabilities less mature than specialized models
- –Occasional over-refusal on edge-case queries
- –High computational cost for maximum context usage
Frequently asked questions
It depends on your needs. Gemini 3 Flash Preview and Grok 4.3 are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.