Google: Gemini 3.5 Flash-Lite wins on more metrics (4 of 7), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Google: Gemini 3.5 Flash-Lite | xAI: Grok 4.20 |
|---|---|---|
| Intelligence Index | 36.5 | 37.0✓ |
| Coding Index | 49.3✓ | — |
| GPQA Diamond | 84% | 91%✓ |
| Design Arena Elo | — | — |
| Speed (tokens/sec) | 341✓ | — |
| Latency | 880ms✓ | — |
| Input price /M | $0.300✓ | $1.25 |
| Output price /M | $2.50 | $2.50 |
| Context window | 1.0M | 2M✓ |
| Capabilities | ReasoningToolsJSONVisionAudio | ReasoningToolsJSONVision |