Gemini 3.1 Flash Lite Preview vs GPT-5.5 Pro
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.
Quick verdict: which should you choose?
Choose Gemini 3.1 Flash Lite Preview if you need
- ✓Choose Gemini 3.1 Flash Lite Preview if you need unified video, audio and file handling at high speed.
- ✓Choose Gemini 3.1 Flash Lite Preview if you need the lowest output cost of $1.5 per million tokens.
- ✓Choose Gemini 3.1 Flash Lite Preview if you need a 1M+ context window optimized for lightweight multimodal tasks.
- ✓Choose Gemini 3.1 Flash Lite Preview if you need documented 290.34 t/s output speed.
Choose GPT-5.5 Pro if you need
- ✓Choose GPT-5.5 Pro if you need the largest listed context window of 1050000 tokens.
- ✓Choose GPT-5.5 Pro if you need seamless multimodal integration focused on files, images and text.
- ✓Choose GPT-5.5 Pro if you need strong reasoning over extended text and image inputs.
- ✓Choose GPT-5.5 Pro if you need native support without audio or video requirements.
Verdict
Gemini 3.1 Flash Lite Preview leads on price, speed, and native video/audio support while GPT-5.5 Pro offers a marginally larger context window and stronger emphasis on extended text/image reasoning. Gemini's $1.5/M output price and 290.34 t/s speed give it clear efficiency advantages; GPT-5.5 Pro's $180/M cost and missing audio/video modalities limit it to narrower use cases despite the 1050000-token context.
Gemini 3.1 Flash Lite Preview vs GPT-5.5 Pro: side by side
| Spec | Gemini 3.1 Flash Lite Preview | GPT-5.5 Pro | Winner |
|---|---|---|---|
| Intelligence | 25 | — | Tie |
| Output speed | 290 t/s | — | Tie |
| Output price | $1.50/1M | $180.00/1M | Gemini 3.1 Flash Lite Preview |
| Context | 1049K | 1050K | GPT-5.5 Pro |
| Params | — | — | Tie |
| Provider | OpenAI | Tie |
Detailed analysis
Pricing
Winner: Gemini 3.1 Flash Lite PreviewGemini 3.1 Flash Lite Preview lists output price at $1.5 per million tokens versus GPT-5.5 Pro at $180 per million tokens. The 120x price gap favors Gemini for any high-volume workload. No input prices are provided for either model.
Speed & Efficiency
Winner: Gemini 3.1 Flash Lite PreviewGemini 3.1 Flash Lite Preview reports 290.34 tokens per second output speed while GPT-5.5 Pro speed is unspecified. Its lightweight design is explicitly optimized for speed, whereas GPT-5.5 Pro notes potential latency on very long inputs.
Modalities
Winner: Gemini 3.1 Flash Lite PreviewGemini 3.1 Flash Lite Preview supports video, audio and files natively; GPT-5.5 Pro supports files, images and text but explicitly lacks audio or video. Both are proprietary multimodal models from major providers.
Context Window
Winner: TieGemini 3.1 Flash Lite Preview lists 1048576 tokens and GPT-5.5 Pro lists 1050000 tokens, a negligible difference. Both models emphasize very large context for document and media tasks.
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
Cons
- –Preview model may show inconsistent behavior
- –Lite variant trades depth for efficiency
- –Experimental features can be less reliable than stable releases
GPT-5.5 Pro
Pros
- +Very large context window
- +Native support for files, images, and text
- +Seamless multimodal integration
Cons
- –High resource use with maximum context
- –No audio or video modalities
- –Potential latency on very long inputs
Summary: Gemini 3.1 Flash Lite Preview vs GPT-5.5 Pro
Select Gemini 3.1 Flash Lite Preview for cost-sensitive, high-speed multimodal work that includes video or audio. Select GPT-5.5 Pro only when the marginal extra context and text/image reasoning outweigh its dramatically higher price and narrower modality support.
Frequently asked questions
Gemini 3.1 Flash Lite Preview at $1.5 per million output tokens versus GPT-5.5 Pro at $180 per million output tokens.