Gemini 3.1 Pro 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 3.1 Pro Preview vs Grok 4.3: side by side
| Spec | Gemini 3.1 Pro Preview | Grok 4.3 | Winner |
|---|---|---|---|
| Intelligence | 46.5 | 35.4 | Gemini 3.1 Pro Preview |
| Output speed | 122 t/s | 124 t/s | Grok 4.3 |
| Output price | $12.00/1M | $2.50/1M | Grok 4.3 |
| Context | 1049K | 1000K | Gemini 3.1 Pro Preview |
| Params | — | — | Tie |
| Provider | xAI | Tie |
Gemini 3.1 Pro Preview
Pros
- +Handles up to 1M token contexts
- +Native support for audio, image, video, and text
- +Strong integration of multiple modalities
Cons
- –Preview model may show inconsistent outputs
- –High resource use with maximum context
- –Requires verification on complex tasks
Grok 4.3
Pros
- +Strong performance on complex multi-step reasoning
- +Large context window for document-level tasks
- +Helpful and direct response style
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 3.1 Pro 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.