Google: Gemini 3.5 Flash wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Google: Gemini 3.5 Flash | OpenAI: GPT-5.4 |
|---|---|---|
| Intelligence Index | 54.8 | 56.8✓ |
| Coding Index | 43.9 | 57.2✓ |
| GPQA Diamond | 92%✓ | 92% |
| Design Arena Elo | 1329✓ | 1304 |
| Speed (tokens/sec) | 174✓ | 63 |
| Latency | 1.9s | 857ms✓ |
| Input price /M | $1.50✓ | $2.50 |
| Output price /M | $9.00✓ | $15.00 |
| Context window | 1.0M | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVisionAudio | ReasoningToolsJSONVision |