Updated March 26, 2026· Based on independent benchmark data
GPT-5.4 mini (xhigh) leads in intelligence with a score of 48.1 vs 44.6. GPT-5.4 mini (xhigh) is 1.7x cheaper at $0.75/1M tokens vs $1.25/1M.
| Metric | GPT-5.4 mini (xhigh) | GPT-5 Codex (high) |
|---|---|---|
| Intelligence Score | 48.1 | 44.6 |
| Coding Score | 51.5 | 38.9 |
| Math Score | N/A | 98.7 |
| Speed (tok/s) | 218 tok/s | 180 tok/s |
| Latency (TTFT) | 7.45s | 9.17s |
| Input Price / 1M tokens | $0.75 | $1.25 |
| Output Price / 1M tokens | $4.50 | $10 |
| Context Window | N/A |
GPT-5.4 mini (xhigh) outperforms GPT-5 Codex (high) on the intelligence index with a score of 48.1 compared to 44.6. For coding tasks, GPT-5.4 mini (xhigh) has the edge with a coding score of 51.5 vs 38.9.
GPT-5.4 mini (xhigh) generates output significantly faster at 218 tok/s compared to GPT-5 Codex (high)'s 180 tok/s, making it 1.2x faster for streaming responses. Time to first token is 7.45s for GPT-5.4 mini (xhigh) vs 9.17s for GPT-5 Codex (high), which affects perceived responsiveness in interactive applications.
GPT-5.4 mini (xhigh) is more affordable at $0.75/1M input tokens ($4.50/1M output), while GPT-5 Codex (high) costs $1.25/1M input ($10/1M output). For a typical workload of 100 requests per day at 2,000 tokens each, GPT-5.4 mini (xhigh) would cost approximately $4.50/month vs $7.50/month for GPT-5 Codex (high) in input costs alone.
Choose GPT-5.4 mini (xhigh) when you need higher intelligence (48.1), stronger coding performance (51.5), lower cost.
GPT-5.4 mini (xhigh) scores higher on coding benchmarks (51.5 vs 38.9), making it the better choice for programming tasks.
GPT-5.4 mini (xhigh) is cheaper at $0.75/1M input tokens vs $1.25/1M for GPT-5 Codex (high).
GPT-5.4 mini (xhigh) is faster, producing output at 218 tok/s compared to GPT-5 Codex (high)'s 180 tok/s.
No, GPT-5.4 mini (xhigh) does not support image input. Neither model supports image input.
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 |
It depends on your priorities. GPT-5.4 mini (xhigh) scores higher on intelligence (48.1), but GPT-5 Codex (high) may be better for specific use cases like budget-conscious projects or speed-critical applications.