Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | GPT-5.1 (high) | Gemini 2.5 Pro |
|---|---|---|
| Input ($/M tokens) | $1.25 | $1.25 |
| Output ($/M tokens) | $10 | $10 |
Data from Artificial Analysis API — 12 benchmarks
Both models have similar pricing. Check the detailed breakdown above for input vs output token costs.
GPT-5.1 (high) wins 11 out of 12 benchmarks compared to 1 for Gemini 2.5 Pro. See the detailed benchmark chart above for per-category results.
Gemini 2.5 Pro generates tokens faster at 131 tok/s vs 87 tok/s. However, Gemini 2.5 Pro has lower time-to-first-token (23.22s vs 31.07s).
Choose based on your priorities: both are similarly priced, GPT-5.1 (high) for stronger benchmark performance, and Gemini 2.5 Pro for faster generation. For latency-sensitive apps, check the TTFT comparison above.