Step 5 Preview vs GPT-5.6 Luna (Max)
GPT-5.6 Luna (Max) scores 37.3 on the Artificial Analysis Intelligence Index, against 28.5 for Step 5 Preview. GPT-5.6 Luna (Max) costs $0.45 per million tokens (3:1 blend), against $1.43 for Step 5 Preview. Step 5 Preview generates 140 t/s, against 107 t/s for GPT-5.6 Luna (Max). Both accept a context of 1M tokens.
Comparison generated from the catalogue data. Add or remove models below to refine it.
2 models compared
- Step 5 Preview
StepFun
- GPT-5.6 Luna (Max)
OpenAI
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | Step 5 Preview StepFun | GPT-5.6 Luna (Max) OpenAI | Add a model · 2/4 |
|---|---|---|---|
| Intelligence | 28.5 | Best: 37.3 | |
| Coding | — | 71.4 | |
| Agentic | — | 42.1 | |
| Cyber Index | 47.7% | — | |
| Speed | Best: 140 t/s | 107 t/s | |
| TTFT | Best: 0.91 s | 144 s | |
| Input · $ / 1M tokens | $1×5 relative to the lowest price among the compared models | Best: $0.20 | |
| Output · $ / 1M tokens | $2.70×2.3 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 | $2.35×13.2 relative to the lowest price among the compared models | Best: $0.178 |
Intelligence
- Step 5 Preview
- 28.5
- GPT-5.6 Luna (Max)
- Best: 37.3
Coding
- Step 5 Preview
- —
- GPT-5.6 Luna (Max)
- 71.4
Agentic
- Step 5 Preview
- —
- GPT-5.6 Luna (Max)
- 42.1
Cyber Index
- Step 5 Preview
- 47.7%
- GPT-5.6 Luna (Max)
- —
Speed
- Step 5 Preview
- Best: 140 t/s
- GPT-5.6 Luna (Max)
- 107 t/s
TTFT
- Step 5 Preview
- Best: 0.91 s
- GPT-5.6 Luna (Max)
- 144 s
Input · $ / 1M tokens
- Step 5 Preview
- $1×5 relative to the lowest price among the compared models
- GPT-5.6 Luna (Max)
- Best: $0.20
Output · $ / 1M tokens
- Step 5 Preview
- $2.70×2.3 relative to the lowest price among the compared models
- GPT-5.6 Luna (Max)
- Best: $1.20
Context window
- Step 5 Preview
- 1M
- GPT-5.6 Luna (Max)
- 1M
Reasoning
- Step 5 Preview
- Yes
- GPT-5.6 Luna (Max)
- Yes
Open weights
- Step 5 Preview
- Yes
- GPT-5.6 Luna (Max)
- No
Cost / task
- Step 5 Preview
- $2.35×13.2 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.
- Step 5 Preview28.5 · $2.35
- GPT-5.6 Luna (Max)37.3 · $0.178