Model Comparator
Compare up to four models using the same criteria.
2 models compared
- GPT-5.6 Luna (Medium)
OpenAI
- GPT-5 Codex (High)
OpenAI
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | GPT-5.6 Luna (Medium) OpenAI | GPT-5 Codex (High) OpenAI | Add a model · 2/4 |
|---|---|---|---|
| Intelligence | Best: 25 | 24.9 | |
| Coding | 50.7 | — | |
| Math | — | 98.7 | |
| Agentic | 23.9 | — | |
| Speed | 122 t/s | Best: 166 t/s | |
| TTFT | Best: 2.69 s | 6.42 s | |
| Input · $ / 1M tokens | Best: $0.20 | $1.25×6.3 relative to the lowest price among the compared models | |
| Output · $ / 1M tokens | Best: $1.20 | $10×8.3 relative to the lowest price among the compared models | |
| Context window | Best: 1M | 400K | |
| Reasoning | Yes | Yes | |
| Open weights | No | No | |
| Cost / task | $0.0156 | — |
Intelligence
- GPT-5.6 Luna (Medium)
- Best: 25
- GPT-5 Codex (High)
- 24.9
Coding
- GPT-5.6 Luna (Medium)
- 50.7
- GPT-5 Codex (High)
- —
Math
- GPT-5.6 Luna (Medium)
- —
- GPT-5 Codex (High)
- 98.7
Agentic
- GPT-5.6 Luna (Medium)
- 23.9
- GPT-5 Codex (High)
- —
Speed
- GPT-5.6 Luna (Medium)
- 122 t/s
- GPT-5 Codex (High)
- Best: 166 t/s
TTFT
- GPT-5.6 Luna (Medium)
- Best: 2.69 s
- GPT-5 Codex (High)
- 6.42 s
Input · $ / 1M tokens
- GPT-5.6 Luna (Medium)
- Best: $0.20
- GPT-5 Codex (High)
- $1.25×6.3 relative to the lowest price among the compared models
Output · $ / 1M tokens
- GPT-5.6 Luna (Medium)
- Best: $1.20
- GPT-5 Codex (High)
- $10×8.3 relative to the lowest price among the compared models
Context window
- GPT-5.6 Luna (Medium)
- Best: 1M
- GPT-5 Codex (High)
- 400K
Reasoning
- GPT-5.6 Luna (Medium)
- Yes
- GPT-5 Codex (High)
- Yes
Open weights
- GPT-5.6 Luna (Medium)
- No
- GPT-5 Codex (High)
- No
Cost / task
- GPT-5.6 Luna (Medium)
- $0.0156
- GPT-5 Codex (High)
- —
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 Luna (Medium)25 · $0.45
- GPT-5 Codex (High)24.9 · $3.44