Updated March 26, 2026· Based on independent benchmark data
GPT-5.3 Codex (xhigh) leads in intelligence with a score of 54.0 vs 29.5. For speed, GPT-5.3 Codex (xhigh) wins at 72 tok/s vs 0 tok/s.
| Metric | Gemini 2.5 Pro Preview (May' 25) | GPT-5.3 Codex (xhigh) |
|---|---|---|
| Intelligence Score | 29.5 | 54.0 |
| Coding Score | N/A | 53.1 |
| Math Score | N/A | N/A |
| Speed (tok/s) | 0 tok/s | 72 tok/s |
| Latency (TTFT) | 0.00s | 83.91s |
| Input Price / 1M tokens | $1.25 | $1.75 |
| Output Price / 1M tokens | $10 | $14 |
| Context Window | N/A |
GPT-5.3 Codex (xhigh) outperforms Gemini 2.5 Pro Preview (May' 25) on the intelligence index with a score of 54.0 compared to 29.5.
GPT-5.3 Codex (xhigh) generates output significantly faster at 72 tok/s compared to Gemini 2.5 Pro Preview (May' 25)'s 0 tok/s, making it Infinityx faster for streaming responses. Time to first token is 0.00s for Gemini 2.5 Pro Preview (May' 25) vs 83.91s for GPT-5.3 Codex (xhigh), which affects perceived responsiveness in interactive applications.
Gemini 2.5 Pro Preview (May' 25) is more affordable at $1.25/1M input tokens ($10/1M output), while GPT-5.3 Codex (xhigh) costs $1.75/1M input ($14/1M output). For a typical workload of 100 requests per day at 2,000 tokens each, Gemini 2.5 Pro Preview (May' 25) would cost approximately $7.50/month vs $10.50/month for GPT-5.3 Codex (xhigh) in input costs alone.
Choose GPT-5.3 Codex (xhigh) when you need higher intelligence (54.0), faster output (72 tok/s).
Gemini 2.5 Pro Preview (May' 25) is cheaper at $1.25/1M input tokens vs $1.75/1M for GPT-5.3 Codex (xhigh).
GPT-5.3 Codex (xhigh) is faster, producing output at 72 tok/s compared to Gemini 2.5 Pro Preview (May' 25)'s 0 tok/s.
No, Gemini 2.5 Pro Preview (May' 25) does not support image input. Neither model supports image input.
It depends on your priorities. GPT-5.3 Codex (xhigh) scores higher on intelligence (54.0), but Gemini 2.5 Pro Preview (May' 25) may be better for specific use cases like budget-conscious projects or speed-critical applications.
Data last synced: March 26, 2026
| N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text | Text |
| Output Modalities | Text | Text |
| Free Tier | No | No |