Gemini 2.5 Pro Preview 06-05 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 2.5 Pro Preview 06-05 vs GPT-5.1-Codex: side by side
| Spec | Gemini 2.5 Pro Preview 06-05 | GPT-5.1-Codex | Winner |
|---|---|---|---|
| Intelligence | — | 34.7 | Tie |
| Output speed | — | 175 t/s | Tie |
| Output price | $10.00/1M | $10.00/1M | Tie |
| Context | 1049K | 400K | Gemini 2.5 Pro Preview 06-05 |
| Params | — | — | Tie |
| Provider | OpenAI | Tie |
Gemini 2.5 Pro Preview 06-05
Pros
- +Handles extremely long inputs effectively
- +Strong integration of text, image, audio and files
- +Solid performance on reasoning and coding tasks
Cons
- –Preview release may show occasional instability
- –Slower responses with maximum context sizes
- –Less optimized for real-time voice conversations
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 2.5 Pro Preview 06-05 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.