Updated March 26, 2026· Based on independent benchmark data
GPT-5.3 Codex (xhigh) leads in intelligence with a score of 54.0 vs 34.6. For speed, Gemini 2.5 Pro wins at 124 tok/s vs 72 tok/s.
| Metric | Gemini 2.5 Pro | GPT-5.3 Codex (xhigh) |
|---|---|---|
| Intelligence Score | 34.6 | 54.0 |
| Coding Score | 31.9 | 53.1 |
| Math Score | 87.7 | N/A |
| Speed (tok/s) | 124 tok/s | 72 tok/s |
| Latency (TTFT) | 23.95s | 83.91s |
| Input Price / 1M tokens | $1.25 | $1.75 |
| Output Price / 1M tokens | $10 | $14 |
| Context Window | 1.0M |
GPT-5.3 Codex (xhigh) outperforms Gemini 2.5 Pro on the intelligence index with a score of 54.0 compared to 34.6. For coding tasks, GPT-5.3 Codex (xhigh) has the edge with a coding score of 53.1 vs 31.9.
Gemini 2.5 Pro generates output significantly faster at 124 tok/s compared to GPT-5.3 Codex (xhigh)'s 72 tok/s, making it 1.7x faster for streaming responses. Time to first token is 23.95s for Gemini 2.5 Pro vs 83.91s for GPT-5.3 Codex (xhigh), which affects perceived responsiveness in interactive applications.
Gemini 2.5 Pro 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 would cost approximately $7.50/month vs $10.50/month for GPT-5.3 Codex (xhigh) in input costs alone.
Choose Gemini 2.5 Pro when you need faster output (124 tok/s). Choose GPT-5.3 Codex (xhigh) when you need higher intelligence (54.0), stronger coding performance (53.1).
GPT-5.3 Codex (xhigh) scores higher on coding benchmarks (53.1 vs 31.9), making it the better choice for programming tasks.
Gemini 2.5 Pro is cheaper at $1.25/1M input tokens vs $1.75/1M for GPT-5.3 Codex (xhigh).
Gemini 2.5 Pro is faster, producing output at 124 tok/s compared to GPT-5.3 Codex (xhigh)'s 72 tok/s.
Yes, Gemini 2.5 Pro supports image input. GPT-5.3 Codex (xhigh) does not support image input.
Data last synced: March 26, 2026
| N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text + Image + File + Audio + Video | Text |
| Output Modalities | Text | Text |
| Free Tier | No | No |
It depends on your priorities. GPT-5.3 Codex (xhigh) scores higher on intelligence (54.0), but Gemini 2.5 Pro may be better for specific use cases like budget-conscious projects or speed-critical applications.