Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs OpenAI: GPT-5 Pro
Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) is cheaper on output tokens, while OpenAI: GPT-5 Pro offers a larger context window. Choose Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) or OpenAI: GPT-5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) | OpenAI: GPT-5 Pro |
|---|---|---|
| Provider | Kilo Gateway | Kilo Gateway |
| Input / 1M tokens | $0.50 | $15.00 |
| Output / 1M tokens | $3.00 | $120.00 |
| Context window | 66K | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Feb 2026 | Oct 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.