Gemini 3.1 Pro Preview vs GPT-5.3-Instant
Gemini 3.1 Pro Preview is cheaper on output tokens, while Gemini 3.1 Pro Preview offers a larger context window. Choose Gemini 3.1 Pro Preview or GPT-5.3-Instant based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Gemini 3.1 Pro Preview | GPT-5.3-Instant |
|---|---|---|
| Provider | Poe | |
| Input / 1M tokens | $2.00 | $1.60 |
| Output / 1M tokens | $12.00 | $13.00 |
| Context window | 1M | 128K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Feb 2026 | Mar 2026 |
| LiveBench score | 77.1 | 59.8 |
| LMArena (Chatbot Arena) Elo score | 1480 | — |
| LMArena WebDev Elo score | 1447 | — |
| LMArena Vision Elo score | 1296 | — |
| GPQA Diamond score | 94.4 | — |
| FrontierMath score | 36.9 | — |
FAQ
Is Gemini 3.1 Pro Preview or GPT-5.3-Instant cheaper?
Gemini 3.1 Pro Preview is cheaper on output tokens ($12.00 vs $13.00 per 1M).
Which has the larger context window, Gemini 3.1 Pro Preview or GPT-5.3-Instant?
Gemini 3.1 Pro Preview has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.