Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Gemini 2.5 Pro Preview (Mar' 25) | GPT-5.4 nano (xhigh) |
|---|---|---|
| Input ($/M tokens) | $0 | $0.2 |
| Output ($/M tokens) | $0 | $1.25 |
Data from Artificial Analysis API — 12 benchmarks
Gemini 2.5 Pro Preview (Mar' 25) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.46/M for GPT-5.4 nano (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-5.4 nano (xhigh) generates tokens faster at 206 tok/s vs 0 tok/s. Gemini 2.5 Pro Preview (Mar' 25) also has lower time-to-first-token (0.00s vs 2.52s).
Choose based on your priorities: Gemini 2.5 Pro Preview (Mar' 25) for lower cost, both perform similarly on benchmarks, and GPT-5.4 nano (xhigh) for faster generation. For latency-sensitive apps, check the TTFT comparison above.