Gemini 3.1 Flash Lite vs GPT-5.2 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 if you need
- ✓Choose Gemini 3.1 Flash Lite if you need high output speed of 310.24 t/s and low latency for real-time multimodal tasks.
- ✓Choose Gemini 3.1 Flash Lite if you need the largest context window at 1,048,576 tokens combined with resource-efficient inference.
- ✓Choose Gemini 3.1 Flash Lite if you need the lowest price at $1.5 per million tokens for text, image, and video workloads.
- ✓Choose Gemini 3.1 Flash Lite if you need a lightweight model that still supports broad modalities without high computational demands.
Choose GPT-5.2 Pro if you need
- ✓Choose GPT-5.2 Pro if you need seamless handling of image, text, and file modalities in extended multi-turn conversations.
- ✓Choose GPT-5.2 Pro if you need strong integration across multiple input types over a 400,000-token context window.
- ✓Choose GPT-5.2 Pro if you need suitability for detailed inputs where maximum context handling is secondary to modality fusion.
Verdict
Gemini 3.1 Flash Lite leads in measurable efficiency metrics with a known intelligence_index of 33.5, output speed of 310.24 t/s, price of $1.5/1M tokens, and context of 1,048,576 tokens. GPT-5.2 Pro offers no disclosed speed or intelligence scores and carries a much higher price of $168/1M tokens with a smaller 400,000-token context. Gemini therefore dominates on speed, cost, and scale while GPT-5.2 Pro's advantages remain limited to its described seamless multi-input integration.
Gemini 3.1 Flash Lite vs GPT-5.2 Pro: side by side
| Spec | Gemini 3.1 Flash Lite | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Intelligence | 33.5 | — | Tie |
| Output speed | 310 t/s | — | Tie |
| Output price | $1.50/1M | $168.00/1M | Gemini 3.1 Flash Lite |
| Context | 1049K | 400K | Gemini 3.1 Flash Lite |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | Tie |
Detailed analysis
Speed
Winner: Gemini 3.1 Flash LiteGemini 3.1 Flash Lite reports a concrete output speed of 310.24 t/s with explicit strengths in high speed and low latency. GPT-5.2 Pro lists no speed value. The data therefore favor Gemini for latency-sensitive multimodal workloads.
Pricing
Winner: Gemini 3.1 Flash LiteGemini 3.1 Flash Lite is priced at $1.5 per million tokens. GPT-5.2 Pro is priced at $168 per million tokens. This 112-fold difference makes Gemini the clear choice for cost-sensitive deployments.
Context Window
Winner: Gemini 3.1 Flash LiteGemini 3.1 Flash Lite provides a 1,048,576-token context while GPT-5.2 Pro offers 400,000 tokens. Gemini's larger window directly supports its listed strength in handling very large contexts.
Multimodal Integration
Winner: TieBoth models are described as multimodal. Gemini covers text, image, and video in a lightweight package; GPT-5.2 Pro emphasizes seamless image, text, and file handling plus multi-turn suitability. Neither set of facts establishes a decisive edge.
Gemini 3.1 Flash Lite
Pros
- +High speed and low latency
- +Handles very large context windows
- +Broad modality support in a lightweight package
- +Resource-efficient inference
Cons
- –Reduced depth on highly complex reasoning tasks
- –Lite design trades peak capability for speed
- –May require more guidance on nuanced or creative outputs
GPT-5.2 Pro
Pros
- +Very large context window for detailed inputs
- +Seamless handling of image, text, and file modalities
- +Strong integration across multiple input types
- +Suitable for extended multi-turn multimodal tasks
Cons
- –High computational demands for maximum context
- –Potential for reduced precision on very long inputs
- –Limited transparency on internal training data
Summary: Gemini 3.1 Flash Lite vs GPT-5.2 Pro
Gemini 3.1 Flash Lite is the stronger pick for most users needing speed, low cost, and maximum context. GPT-5.2 Pro is preferable only when its specific modality-integration strengths outweigh the unknowns and high price. Buyers should select based on whether efficiency metrics or unquantified integration matter more.
Frequently asked questions
Gemini 3.1 Flash Lite is faster, with a documented output speed of 310.24 t/s; GPT-5.2 Pro provides no speed figure.