Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Gemini 3 Pro Preview (high) | Gemini 3 Flash Preview (Reasoning) |
|---|---|---|
| Input ($/M tokens) | $2 | $0.5 |
| Output ($/M tokens) | $12 | $3 |
Data from Artificial Analysis API — 12 benchmarks
Gemini 3 Flash Preview (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $1.13/M tokens vs $4.50/M for Gemini 3 Pro Preview (high).
Gemini 3 Pro Preview (high) wins 8 out of 12 benchmarks compared to 3 for Gemini 3 Flash Preview (Reasoning). See the detailed benchmark chart above for per-category results.
Gemini 3 Flash Preview (Reasoning) generates tokens faster at 191 tok/s vs 127 tok/s. However, Gemini 3 Flash Preview (Reasoning) has lower time-to-first-token (5.47s vs 19.67s).
Choose based on your priorities: Gemini 3 Flash Preview (Reasoning) for lower cost, Gemini 3 Pro Preview (high) for stronger benchmark performance, and Gemini 3 Flash Preview (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.