Model Comparator
Compare up to four models using the same criteria.
2 models compared
- GPT-5.5 (Xhigh)
OpenAI
- GPT-5.6 Luna (Max)
OpenAI
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | GPT-5.5 (Xhigh) OpenAI | GPT-5.6 Luna (Max) OpenAI | Add a model · 2/4 |
|---|---|---|---|
| Intelligence | Best: 38.4 | 37.3 | |
| Coding | Best: 74.9 | 71.4 | |
| Agentic | 36.4 | Best: 42.1 | |
| Speed | 75.5 t/s | Best: 104 t/s | |
| TTFT | Best: 51.8 s | 139 s | |
| Input · $ / 1M tokens | $5×25 relative to the lowest price among the compared models | Best: $0.20 | |
| Output · $ / 1M tokens | $30×25 relative to the lowest price among the compared models | Best: $1.20 | |
| Context window | 1M | 1M | |
| Reasoning | Yes | Yes | |
| Open weights | No | No | |
| Cost / task | $2.10×11.8 relative to the lowest price among the compared models | Best: $0.178 |
Intelligence
- GPT-5.5 (Xhigh)
- Best: 38.4
- GPT-5.6 Luna (Max)
- 37.3
Coding
- GPT-5.5 (Xhigh)
- Best: 74.9
- GPT-5.6 Luna (Max)
- 71.4
Agentic
- GPT-5.5 (Xhigh)
- 36.4
- GPT-5.6 Luna (Max)
- Best: 42.1
Speed
- GPT-5.5 (Xhigh)
- 75.5 t/s
- GPT-5.6 Luna (Max)
- Best: 104 t/s
TTFT
- GPT-5.5 (Xhigh)
- Best: 51.8 s
- GPT-5.6 Luna (Max)
- 139 s
Input · $ / 1M tokens
- GPT-5.5 (Xhigh)
- $5×25 relative to the lowest price among the compared models
- GPT-5.6 Luna (Max)
- Best: $0.20
Output · $ / 1M tokens
- GPT-5.5 (Xhigh)
- $30×25 relative to the lowest price among the compared models
- GPT-5.6 Luna (Max)
- Best: $1.20
Context window
- GPT-5.5 (Xhigh)
- 1M
- GPT-5.6 Luna (Max)
- 1M
Reasoning
- GPT-5.5 (Xhigh)
- Yes
- GPT-5.6 Luna (Max)
- Yes
Open weights
- GPT-5.5 (Xhigh)
- No
- GPT-5.6 Luna (Max)
- No
Cost / task
- GPT-5.5 (Xhigh)
- $2.10×11.8 relative to the lowest price among the compared models
- GPT-5.6 Luna (Max)
- Best: $0.178
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-5.5 (Xhigh)38.4 · $2.10
- GPT-5.6 Luna (Max)37.3 · $0.178