OpenAI: GPT-5 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-5 | StepFun: Step 3.7 Flash |
|---|---|---|
| Intelligence Index | 42.0 | 42.6✓ |
| Coding Index | 38.9✓ | 37.1 |
| GPQA Diamond | 84%✓ | 81% |
| Design Arena Elo | 1282✓ | 1232 |
| Speed (tokens/sec) | 55 | 82✓ |
| Latency | 705ms✓ | 1.5s |
| Input price /M | $1.25 | $0.200✓ |
| Output price /M | $10.00 | $1.15✓ |
| Context window | 400K✓ | 256K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |