Gemini 3.1 Pro Preview vs GPT-5.1-Codex
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 GPT-5.1-Codex: side by side
| Spec | Gemini 3.1 Pro Preview | GPT-5.1-Codex | Winner |
|---|---|---|---|
| Intelligence | 46.5 | 34.7 | Gemini 3.1 Pro Preview |
| Output speed | 122 t/s | 175 t/s | GPT-5.1-Codex |
| Output price | $12.00/1M | $10.00/1M | GPT-5.1-Codex |
| Context | 1049K | 400K | Gemini 3.1 Pro Preview |
| Params | — | — | Tie |
| Provider | OpenAI | 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
GPT-5.1-Codex
Pros
- +Strong performance on extended coding workflows
- +Effective integration of visual context with code
- +Handles very large inputs without losing coherence
Cons
- –Limited to text and image inputs only
- –High computational cost for maximum context
- –May require careful prompt engineering for complex tasks
Frequently asked questions
It depends on your needs. Gemini 3.1 Pro Preview and GPT-5.1-Codex are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.