DeepSeek: DeepSeek V4 Flash wins on more metrics (7 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Sonnet 4.6 | DeepSeek: DeepSeek V4 Flash |
|---|---|---|
| Intelligence Index | — | 40.3✓ |
| Coding Index | 43.0✓ | 38.7 |
| GPQA Diamond | 80% | 89%✓ |
| Design Arena Elo | 1327✓ | 1275 |
| Speed (tokens/sec) | 46 | 71✓ |
| Latency | 1.2s | 392ms✓ |
| Input price /M | $3.00 | $0.090✓ |
| Output price /M | $15.00 | $0.180✓ |
| Context window | 1M | 1.0M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |