Updated March 26, 2026· Based on independent benchmark data
GPT-5.3 Codex (xhigh) leads in intelligence with a score of 54.0 vs 25.8. GPT-5.3 Codex (xhigh) is 85.7x cheaper at $1.75/1M tokens vs $150/1M. For speed, GPT-5.3 Codex (xhigh) wins at 72 tok/s vs 0 tok/s.
| Metric | o1-pro | GPT-5.3 Codex (xhigh) |
|---|---|---|
| Intelligence Score | 25.8 | 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 | $150 | $1.75 |
| Output Price / 1M tokens | $600 | $14 |
| Context Window | 200K | N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text + Image + File | Text |
GPT-5.3 Codex (xhigh) outperforms o1-pro on the intelligence index with a score of 54.0 compared to 25.8.
GPT-5.3 Codex (xhigh) generates output significantly faster at 72 tok/s compared to o1-pro's 0 tok/s, making it Infinityx faster for streaming responses. Time to first token is 0.00s for o1-pro vs 83.91s for GPT-5.3 Codex (xhigh), which affects perceived responsiveness in interactive applications.
GPT-5.3 Codex (xhigh) is more affordable at $1.75/1M input tokens ($14/1M output), while o1-pro costs $150/1M input ($600/1M output). That makes o1-pro 85.7x more expensive per token, which can add up significantly at scale. For a typical workload of 100 requests per day at 2,000 tokens each, o1-pro would cost approximately $900.00/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), lower cost.
GPT-5.3 Codex (xhigh) is cheaper at $1.75/1M input tokens vs $150/1M for o1-pro.
GPT-5.3 Codex (xhigh) is faster, producing output at 72 tok/s compared to o1-pro's 0 tok/s.
Yes, o1-pro supports image input. GPT-5.3 Codex (xhigh) does not support image input.
It depends on your priorities. GPT-5.3 Codex (xhigh) scores higher on intelligence (54.0), but o1-pro may be better for specific use cases like budget-conscious projects or speed-critical applications.
Data last synced: March 26, 2026
| Output Modalities |
| Text |
| Text |
| Free Tier | No | No |