Model Comparator
Compare up to four models using the same criteria.
2 models compared
- GPT-5.6 Terra (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-5.6 Terra (Xhigh) OpenAI | GPT-5.5 (Xhigh) OpenAI | Add a model · 2/4 |
|---|---|---|---|
| Intelligence | 38 | Best: 38.4 | |
| Coding | 70.6 | Best: 74.9 | |
| Agentic | Best: 41.4 | 36.4 | |
| Speed | Best: 98.4 t/s | 81.9 t/s | |
| TTFT | Best: 33.3 s | 58.6 s | |
| Input · $ / 1M tokens | Best: $2 | $5×2.5 relative to the lowest price among the compared models | |
| Output · $ / 1M tokens | Best: $12 | $30×2.5 relative to the lowest price among the compared models | |
| Context window | Best: 1M | 922K | |
| Reasoning | Yes | Yes | |
| Open weights | No | No | |
| Cost / task | Best: $0.632 | $2.63×4.2 relative to the lowest price among the compared models |
Intelligence
- GPT-5.6 Terra (Xhigh)
- 38
- GPT-5.5 (Xhigh)
- Best: 38.4
Coding
- GPT-5.6 Terra (Xhigh)
- 70.6
- GPT-5.5 (Xhigh)
- Best: 74.9
Agentic
- GPT-5.6 Terra (Xhigh)
- Best: 41.4
- GPT-5.5 (Xhigh)
- 36.4
Speed
- GPT-5.6 Terra (Xhigh)
- Best: 98.4 t/s
- GPT-5.5 (Xhigh)
- 81.9 t/s
TTFT
- GPT-5.6 Terra (Xhigh)
- Best: 33.3 s
- GPT-5.5 (Xhigh)
- 58.6 s
Input · $ / 1M tokens
- GPT-5.6 Terra (Xhigh)
- Best: $2
- GPT-5.5 (Xhigh)
- $5×2.5 relative to the lowest price among the compared models
Output · $ / 1M tokens
- GPT-5.6 Terra (Xhigh)
- Best: $12
- GPT-5.5 (Xhigh)
- $30×2.5 relative to the lowest price among the compared models
Context window
- GPT-5.6 Terra (Xhigh)
- Best: 1M
- GPT-5.5 (Xhigh)
- 922K
Reasoning
- GPT-5.6 Terra (Xhigh)
- Yes
- GPT-5.5 (Xhigh)
- Yes
Open weights
- GPT-5.6 Terra (Xhigh)
- No
- GPT-5.5 (Xhigh)
- No
Cost / task
- GPT-5.6 Terra (Xhigh)
- Best: $0.632
- GPT-5.5 (Xhigh)
- $2.63×4.2 relative to the lowest price among the compared models
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-5.6 Terra (Xhigh)38 · $0.632
- GPT-5.5 (Xhigh)38.4 · $2.63