Gemini 3.1 Flash Lite 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 Flash Lite Preview vs GPT-5.1-Codex: side by side
| Spec | Gemini 3.1 Flash Lite Preview | GPT-5.1-Codex | Winner |
|---|---|---|---|
| Intelligence | 33.5 | 43.1 | GPT-5.1-Codex |
| Output speed | 310 t/s | 178 t/s | Gemini 3.1 Flash Lite Preview |
| Output price | $1.50/1M | $10.00/1M | Gemini 3.1 Flash Lite Preview |
| Context | 1049K | 400K | Gemini 3.1 Flash Lite Preview |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | Tie |
Gemini 3.1 Flash Lite Preview
Pros
- +Broad native support for multiple modalities
- +Very large context window for document and media tasks
- +Lightweight design optimized for speed
- +Unified handling of video, audio and files
Cons
- –Preview model may show inconsistent behavior
- –Lite variant trades depth for efficiency
- –Experimental features can be less reliable than stable releases
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
- +Specialized for software development tasks
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 Flash Lite 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.