Gemini 3 Flash Preview vs GPT-5 Mini
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 Flash Preview if you need
- ✓Choose GPT-5 Mini if you need lower output cost at $2 per 1M tokens for high-volume use.
- ✓Choose GPT-5 Mini if you need efficient handling of very large 400k contexts with text, image, and file inputs.
- ✓Choose GPT-5 Mini if you need compact multimodal design optimized for complex multi-turn tasks.
- ✓Choose GPT-5 Mini if you need careful prompting for nuanced outputs without preview instability.
Choose GPT-5 Mini if you need
- ✓Choose Gemini 3 Flash Preview if you need higher intelligence score of 46.4.
- ✓Choose Gemini 3 Flash Preview if you need faster output at 188.42 t/s and 1M context window.
- ✓Choose Gemini 3 Flash Preview if you need native support for text, image, audio, video, and files.
- ✓Choose Gemini 3 Flash Preview if you need fast inference suitable for preview-stage multimodal tasks.
Verdict
Gemini 3 Flash Preview leads with higher intelligence (46.4 vs 38.9) and more than double the output speed (188.42 vs 96.66 t/s) plus a larger 1M context, while GPT-5 Mini wins on lower price ($2 vs $3 per 1M tokens) and explicit support for complex multi-turn tasks with text/image/file inputs. Gemini adds native audio and video handling but carries preview instability risks and shallower reasoning notes. GPT-5 Mini offers a more compact, cost-efficient option for focused multimodal workflows.
Gemini 3 Flash Preview vs GPT-5 Mini: side by side
| Spec | Gemini 3 Flash Preview | GPT-5 Mini | Winner |
|---|---|---|---|
| Intelligence | 46.4 | 38.9 | Gemini 3 Flash Preview |
| Output speed | 188 t/s | 97 t/s | Gemini 3 Flash Preview |
| Output price | $3.00/1M | $2.00/1M | GPT-5 Mini |
| Context | 1049K | 400K | Gemini 3 Flash Preview |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | Tie |
Detailed analysis
Intelligence
Winner: Gemini 3 Flash PreviewGemini 3 Flash Preview scores 46.4 on the intelligence index compared to GPT-5 Mini's 38.9. Both are noted for reduced depth versus full-size models, but Gemini's higher index indicates stronger overall capability on the provided metrics.
Speed & Context
Winner: Gemini 3 Flash PreviewGemini 3 Flash Preview delivers 188.42 t/s output speed and a 1,048,576-token context versus GPT-5 Mini's 96.66 t/s and 400,000-token context. Both efficiently manage large contexts, but Gemini's advantages are clear on raw speed and scale.
Pricing
Winner: GPT-5 MiniGPT-5 Mini is priced at $2 per 1M output tokens while Gemini 3 Flash Preview costs $3 per 1M. This gives GPT-5 Mini a consistent cost advantage for equivalent usage volumes.
Modalities & Features
Winner: Gemini 3 Flash PreviewGemini 3 Flash Preview natively supports text, image, audio, video, and files with fast inference, whereas GPT-5 Mini focuses on text, image, and files for complex multi-turn tasks. Gemini lacks mentioned tool-use or browsing, while GPT-5 Mini emphasizes input clarity and prompting.
Gemini 3 Flash Preview
Pros
- +Broad native support for text, image, audio, video and files
- +Efficient handling of very large contexts
- +Fast inference suitable for preview use
Cons
- –Preview status may include occasional instability
- –Reasoning depth can be shallower than full-scale models
- –No native tool-use or external browsing mentioned
GPT-5 Mini
Pros
- +Handles very large contexts efficiently
- +Integrates text, image, and file inputs
- +Suitable for complex multi-turn tasks
- +Compact multimodal design
Cons
- –Reduced depth on highly complex reasoning vs full-size models
- –Performance depends on input clarity across modalities
- –May require careful prompting for nuanced outputs
Summary: Gemini 3 Flash Preview vs GPT-5 Mini
Select GPT-5 Mini when cost efficiency and multi-turn text/image/file workflows at 400k context are priorities. Choose Gemini 3 Flash Preview for superior speed, intelligence, larger context, and broader audio/video support despite higher price and preview limitations. The decision hinges on whether speed and modalities outweigh the $1 per 1M token premium.
Frequently asked questions
Gemini 3 Flash Preview scores higher on intelligence and speed with more modalities and context, but GPT-5 Mini is cheaper and optimized for multi-turn tasks; neither is universally better.