Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Gemini 3 Pro Preview (high) | GPT-5.3 Codex (xhigh) |
|---|---|---|
| Input ($/M tokens) | $2 | $1.75 |
| Output ($/M tokens) | $12 | $14 |
Data from Artificial Analysis API — 12 benchmarks
Gemini 3 Pro Preview (high) is cheaper overall. Its blended price (3:1 input/output ratio) is $4.50/M tokens vs $4.81/M for GPT-5.3 Codex (xhigh).
It's a tie — both models win 5 benchmarks each across 12 evaluated categories. See the detailed benchmark chart above for per-category results.
GPT-5.3 Codex (xhigh) generates tokens faster at 90 tok/s vs 0 tok/s. Gemini 3 Pro Preview (high) also has lower time-to-first-token (0.00s vs 89.09s).
Choose based on your priorities: Gemini 3 Pro Preview (high) for lower cost, both perform similarly on benchmarks, and GPT-5.3 Codex (xhigh) for faster generation. For latency-sensitive apps, check the TTFT comparison above.