DeepSeek: DeepSeek V4 Pro vs OpenAI: GPT-5.3-Codex
DeepSeek: DeepSeek V4 Pro wins on more metrics (6 of 8), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | DeepSeek: DeepSeek V4 Pro | OpenAI: GPT-5.3-Codex |
|---|---|---|
| Intelligence Index | 44.3 | 44.3 |
| Coding Index | 59.4✓ | — |
| GPQA Diamond | 89% | 92%✓ |
| Design Arena Elo | 1324✓ | 1206 |
| Speed (tokens/sec) | 56 | 63✓ |
| Latency | 552ms✓ | 2.1s |
| Input price /M | $0.435✓ | $1.75 |
| Output price /M | $0.870✓ | $14.00 |
| Context window | 1.0M✓ | 400K |
| Capabilities | ReasoningToolsJSON | ReasoningToolsJSONVision |