Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Gemini 2.5 Flash-Lite (Reasoning) | GPT-5 nano (high) |
|---|---|---|
| Input ($/M tokens) | $0.1 | $0.05 |
| Output ($/M tokens) | $0.4 | $0.4 |
Data from Artificial Analysis API — 12 benchmarks
GPT-5 nano (high) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.14/M tokens vs $0.17/M for Gemini 2.5 Flash-Lite (Reasoning).
GPT-5 nano (high) wins 11 out of 12 benchmarks compared to 1 for Gemini 2.5 Flash-Lite (Reasoning). See the detailed benchmark chart above for per-category results.
Gemini 2.5 Flash-Lite (Reasoning) generates tokens faster at 238 tok/s vs 159 tok/s. Gemini 2.5 Flash-Lite (Reasoning) also has lower time-to-first-token (19.33s vs 72.48s).
Choose based on your priorities: GPT-5 nano (high) for lower cost, GPT-5 nano (high) for stronger benchmark performance, and Gemini 2.5 Flash-Lite (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.