Updated March 26, 2026· Based on independent benchmark data
GPT-5.4 (xhigh) leads in intelligence with a score of 57.2 vs 18.6. For speed, GPT-5.4 (xhigh) wins at 77 tok/s vs 0 tok/s.
| Metric | GPT-4o (March 2025, chatgpt-4o-latest) | GPT-5.4 (xhigh) |
|---|---|---|
| Intelligence Score | 18.6 | 57.2 |
| Coding Score | N/A | 57.3 |
| Math Score | 25.7 | N/A |
| Speed (tok/s) | 0 tok/s | 77 tok/s |
| Latency (TTFT) | 0.00s | 181.82s |
| Input Price / 1M tokens | Free | $2.50 |
| Output Price / 1M tokens | Free | $15 |
| Context Window | N/A | N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text | Text |
GPT-5.4 (xhigh) outperforms GPT-4o (March 2025, chatgpt-4o-latest) on the intelligence index with a score of 57.2 compared to 18.6.
GPT-5.4 (xhigh) generates output significantly faster at 77 tok/s compared to GPT-4o (March 2025, chatgpt-4o-latest)'s 0 tok/s, making it Infinityx faster for streaming responses. Time to first token is 0.00s for GPT-4o (March 2025, chatgpt-4o-latest) vs 181.82s for GPT-5.4 (xhigh), which affects perceived responsiveness in interactive applications.
GPT-4o (March 2025, chatgpt-4o-latest) is completely free, while GPT-5.4 (xhigh) costs $2.50/1M input tokens and $15/1M output tokens.
Choose GPT-5.4 (xhigh) when you need higher intelligence (57.2), faster output (77 tok/s).
GPT-5.4 (xhigh) is faster, producing output at 77 tok/s compared to GPT-4o (March 2025, chatgpt-4o-latest)'s 0 tok/s.
No, GPT-4o (March 2025, chatgpt-4o-latest) does not support image input. Neither model supports image input.
It depends on your priorities. GPT-5.4 (xhigh) scores higher on intelligence (57.2), but GPT-4o (March 2025, chatgpt-4o-latest) may be better for specific use cases like cost savings or speed-critical applications.
Data last synced: March 26, 2026
| Output Modalities | Text | Text |
| Free Tier | Yes | No |