Inception: Mercury 2 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Inception: Mercury 2 | OpenAI: o4 Mini |
|---|---|---|
| Intelligence Index | 32.8 | 33.1✓ |
| Coding Index | 30.6✓ | 25.6 |
| GPQA Diamond | 77% | 78%✓ |
| Design Arena Elo | — | 1072✓ |
| Speed (tokens/sec) | 476✓ | 125 |
| Latency | 253ms✓ | 4.7s |
| Input price /M | $0.250✓ | $1.10 |
| Output price /M | $0.750✓ | $4.40 |
| Context window | 128K | 200K✓ |
| Capabilities | ReasoningToolsJSON | ReasoningToolsJSONVision |