Updated March 26, 2026· Based on independent benchmark data
Gemini 3.1 Pro Preview leads in intelligence with a score of 57.2 vs 49.0.
| Metric | Gemini 3.1 Pro Preview | GPT-5.2 Codex (xhigh) |
|---|---|---|
| Intelligence Score | 57.2 | 49.0 |
| Coding Score | 55.5 | 43.0 |
| Math Score | N/A | N/A |
| Speed (tok/s) | 113 tok/s | 99 tok/s |
| Latency (TTFT) | 23.84s | 6.86s |
| Input Price / 1M tokens | $2.00 | $1.75 |
| Output Price / 1M tokens | $12 | $14 |
| Context Window | 1.0M |
Gemini 3.1 Pro Preview outperforms GPT-5.2 Codex (xhigh) on the intelligence index with a score of 57.2 compared to 49.0. For coding tasks, Gemini 3.1 Pro Preview has the edge with a coding score of 55.5 vs 43.0.
Both models deliver similar output speeds: Gemini 3.1 Pro Preview at 113 tok/s and GPT-5.2 Codex (xhigh) at 99 tok/s. Time to first token is 6.86s for GPT-5.2 Codex (xhigh) vs 23.84s for Gemini 3.1 Pro Preview, which affects perceived responsiveness in interactive applications.
GPT-5.2 Codex (xhigh) is more affordable at $1.75/1M input tokens ($14/1M output), while Gemini 3.1 Pro Preview costs $2.00/1M input ($12/1M output). For a typical workload of 100 requests per day at 2,000 tokens each, Gemini 3.1 Pro Preview would cost approximately $12.00/month vs $10.50/month for GPT-5.2 Codex (xhigh) in input costs alone.
Choose Gemini 3.1 Pro Preview when you need higher intelligence (57.2), stronger coding performance (55.5).
Gemini 3.1 Pro Preview scores higher on coding benchmarks (55.5 vs 43.0), making it the better choice for programming tasks.
GPT-5.2 Codex (xhigh) is cheaper at $1.75/1M input tokens vs $2.00/1M for Gemini 3.1 Pro Preview.
Gemini 3.1 Pro Preview is faster, producing output at 113 tok/s compared to GPT-5.2 Codex (xhigh)'s 99 tok/s.
Yes, Gemini 3.1 Pro Preview supports image input. GPT-5.2 Codex (xhigh) does not support image input.
Data last synced: March 26, 2026
| N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Audio + File + Image + Text + Video | Text |
| Output Modalities | Text | Text |
| Free Tier | No | No |
It depends on your priorities. Gemini 3.1 Pro Preview scores higher on intelligence (57.2), but GPT-5.2 Codex (xhigh) may be better for specific use cases like budget-conscious projects or speed-critical applications.