Gemini 3.1 Pro (Preview Custom Tools) vs Gemini 3 Pro Image
Both have similar output pricing. Choose Gemini 3.1 Pro (Preview Custom Tools) or Gemini 3 Pro Image based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Gemini 3.1 Pro (Preview Custom Tools) | Gemini 3 Pro Image |
|---|---|---|
| Provider | NanoGPT | NanoGPT |
| Input / 1M tokens | $2.00 | $2.00 |
| Output / 1M tokens | $12.00 | $12.00 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Feb 2026 | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.