OpenAI: GPT-5.4 Mini wins on more metrics (6 of 8), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-3.5 Turbo (older v0613) | OpenAI: GPT-5.4 Mini |
|---|---|---|
| Intelligence Index | — | 23.3✓ |
| Coding Index | — | 25.3✓ |
| GPQA Diamond | — | 61%✓ |
| Design Arena Elo | — | — |
| Speed (tokens/sec) | 33 | 94✓ |
| Latency | 413ms✓ | 735ms |
| Input price /M | $1.00 | $0.750✓ |
| Output price /M | $2.00✓ | $4.50 |
| Context window | 4K | 400K✓ |
| Capabilities | ToolsJSON | ReasoningToolsJSONVision |