Model Comparator
Compare up to four models using the same criteria.
2 models compared
- GPT-5.4 (Xhigh)
OpenAI
- GPT-5.5 (Xhigh)
OpenAI
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | GPT-5.4 (Xhigh) OpenAI | GPT-5.5 (Xhigh) OpenAI | Add a model · 2/4 |
|---|---|---|---|
| Intelligence | Best: 39 | 38.4 | |
| Coding | 71.1 | Best: 74.9 | |
| Agentic | — | 36.4 | |
| Speed | Best: 85.4 t/s | 75.5 t/s | |
| TTFT | 229 s | Best: 51.8 s | |
| Input · $ / 1M tokens | Best: $2.50 | $5×2 relative to the lowest price among the compared models | |
| Output · $ / 1M tokens | Best: $15 | $30×2 relative to the lowest price among the compared models | |
| Context window | Best: 1.1M | 1M | |
| Reasoning | Yes | Yes | |
| Open weights | No | No | |
| Cost / task | — | $2.10 |
Intelligence
- GPT-5.4 (Xhigh)
- Best: 39
- GPT-5.5 (Xhigh)
- 38.4
Coding
- GPT-5.4 (Xhigh)
- 71.1
- GPT-5.5 (Xhigh)
- Best: 74.9
Agentic
- GPT-5.4 (Xhigh)
- —
- GPT-5.5 (Xhigh)
- 36.4
Speed
- GPT-5.4 (Xhigh)
- Best: 85.4 t/s
- GPT-5.5 (Xhigh)
- 75.5 t/s
TTFT
- GPT-5.4 (Xhigh)
- 229 s
- GPT-5.5 (Xhigh)
- Best: 51.8 s
Input · $ / 1M tokens
- GPT-5.4 (Xhigh)
- Best: $2.50
- GPT-5.5 (Xhigh)
- $5×2 relative to the lowest price among the compared models
Output · $ / 1M tokens
- GPT-5.4 (Xhigh)
- Best: $15
- GPT-5.5 (Xhigh)
- $30×2 relative to the lowest price among the compared models
Context window
- GPT-5.4 (Xhigh)
- Best: 1.1M
- GPT-5.5 (Xhigh)
- 1M
Reasoning
- GPT-5.4 (Xhigh)
- Yes
- GPT-5.5 (Xhigh)
- Yes
Open weights
- GPT-5.4 (Xhigh)
- No
- GPT-5.5 (Xhigh)
- No
Cost / task
- GPT-5.4 (Xhigh)
- —
- GPT-5.5 (Xhigh)
- $2.10
Each reasoning level remains a separate configuration.
Score and cost
Each line joins the reasoning levels of a compared model; the large point marks the configuration in the table. The top-right corner holds the best score for the lowest cost. Select another point to compare that level.
- GPT-5.4 (Xhigh)39 · $5.63
- GPT-5.5 (Xhigh)38.4 · $11.25