Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | GPT-5 nano (minimal) | Gemini 2.5 Flash-Lite Preview (Sep '25) (Reasoning) |
|---|---|---|
| Input ($/M tokens) | $0.05 | $0.1 |
| Output ($/M tokens) | $0.4 | $0.4 |
Data from Artificial Analysis API — 12 benchmarks
GPT-5 nano (minimal) 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 Preview (Sep '25) (Reasoning).
Gemini 2.5 Flash-Lite Preview (Sep '25) (Reasoning) wins 10 out of 12 benchmarks compared to 1 for GPT-5 nano (minimal). See the detailed benchmark chart above for per-category results.
Gemini 2.5 Flash-Lite Preview (Sep '25) (Reasoning) generates tokens faster at 365 tok/s vs 163 tok/s. GPT-5 nano (minimal) also has lower time-to-first-token (0.78s vs 3.39s).
Choose based on your priorities: GPT-5 nano (minimal) for lower cost, Gemini 2.5 Flash-Lite Preview (Sep '25) (Reasoning) for stronger benchmark performance, and Gemini 2.5 Flash-Lite Preview (Sep '25) (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.