Claude Opus 5.5 (Max, Default Fallback) vs GPT-5.6 Luna (Max)
Claude Opus 5.5 (Max, Default Fallback) scores 59.1 on the Artificial Analysis Intelligence Index, against 37.3 for GPT-5.6 Luna (Max). GPT-5.6 Luna (Max) costs $0.45 per million tokens (3:1 blend), against $8 for Claude Opus 5.5 (Max, Default Fallback). GPT-5.6 Luna (Max) generates 107 t/s, against 95 t/s for Claude Opus 5.5 (Max, Default Fallback). Both accept a context of 1M tokens.
Comparison generated from the catalogue data. Add or remove models below to refine it.
2 models compared
- GPT-5.6 Luna (Max)
OpenAI
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | GPT-5.6 Luna (Max) OpenAI | Add a model · 2/4 | |
|---|---|---|---|
| Intelligence | Best: 59.1 | 37.3 | |
| Coding | — | 71.4 | |
| Agentic | — | 42.1 | |
| Cyber Index | 28.7% | — | |
| Speed | 95 t/s | Best: 107 t/s | |
| TTFT | 643 s | Best: 144 s | |
| Input · $ / 1M tokens | $4×20 relative to the lowest price among the compared models | Best: $0.20 | |
| Output · $ / 1M tokens | $20×16.7 relative to the lowest price among the compared models | Best: $1.20 | |
| Context window | 1M | 1M | |
| Reasoning | Yes | Yes | |
| Open weights | Yes | No | |
| Cost / task | $10.04×56.3 relative to the lowest price among the compared models | Best: $0.178 |
Intelligence
- Claude Opus 5.5 (Max, Default Fallback)
- Best: 59.1
- GPT-5.6 Luna (Max)
- 37.3
Coding
- Claude Opus 5.5 (Max, Default Fallback)
- —
- GPT-5.6 Luna (Max)
- 71.4
Agentic
- Claude Opus 5.5 (Max, Default Fallback)
- —
- GPT-5.6 Luna (Max)
- 42.1
Cyber Index
- Claude Opus 5.5 (Max, Default Fallback)
- 28.7%
- GPT-5.6 Luna (Max)
- —
Speed
- Claude Opus 5.5 (Max, Default Fallback)
- 95 t/s
- GPT-5.6 Luna (Max)
- Best: 107 t/s
TTFT
- Claude Opus 5.5 (Max, Default Fallback)
- 643 s
- GPT-5.6 Luna (Max)
- Best: 144 s
Input · $ / 1M tokens
- Claude Opus 5.5 (Max, Default Fallback)
- $4×20 relative to the lowest price among the compared models
- GPT-5.6 Luna (Max)
- Best: $0.20
Output · $ / 1M tokens
- Claude Opus 5.5 (Max, Default Fallback)
- $20×16.7 relative to the lowest price among the compared models
- GPT-5.6 Luna (Max)
- Best: $1.20
Context window
- Claude Opus 5.5 (Max, Default Fallback)
- 1M
- GPT-5.6 Luna (Max)
- 1M
Reasoning
- Claude Opus 5.5 (Max, Default Fallback)
- Yes
- GPT-5.6 Luna (Max)
- Yes
Open weights
- Claude Opus 5.5 (Max, Default Fallback)
- Yes
- GPT-5.6 Luna (Max)
- No
Cost / task
- Claude Opus 5.5 (Max, Default Fallback)
- $10.04×56.3 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.
- Claude Opus 5.5 (Max, Default Fallback)59.1 · $10.04
- GPT-5.6 Luna (Max)37.3 · $0.178