OpenAI: o4 Mini Deep Research wins on more metrics (4 of 5), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-5.5 Pro | OpenAI: o4 Mini Deep Research |
|---|---|---|
| Intelligence Index | — | — |
| Coding Index | — | — |
| GPQA Diamond | — | — |
| Design Arena Elo | — | — |
| Speed (tokens/sec) | 17 | 120✓ |
| Latency | 50.2s | 10.2s✓ |
| Input price /M | $30.00 | $2.00✓ |
| Output price /M | $180.00 | $8.00✓ |
| Context window | 1.1M✓ | 200K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |