Gemini 3.1 Pro vs GPT-5 mini
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Gemini 3.1 Pro
Google · Mar 2026
Google's flagship with the industry's largest context window — 2M tokens — and frontier multimodal reasoning at $2/$12.
GPT-5 mini
OpenAI · Aug 2025
A fast, cheap distillation of GPT-5 for high-volume workloads — one fifth of the flagship's price with most of its everyday capability.
The verdict
Gemini 3.1 Pro wins 1 of the 1 benchmarks these models share, against 0 for GPT-5 mini. On price the gap is dramatic: GPT-5 mini works out roughly 6.5x cheaper per blended million tokens. Gemini 3.1 Pro also takes 2M of context versus 400K for GPT-5 mini.
Benchmark head-to-head 1–0
Specs & pricing
| Gemini 3.1 Pro | GPT-5 mini | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $2 | $0.25 |
| Output price / 1M | $12 | $2 |
| Context window | 2M | 400K |
| Max output | 66K | 128K |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image, audio, video | text, image |
| Knowledge cutoff | Nov 2025 | May 2024 |
| Released | Mar 2026 | Aug 2025 |
| Example monthly cost* | $38.00 | $5.50 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Gemini 3.1 Pro or GPT-5 mini?
- Gemini 3.1 Pro wins 1 of the 1 benchmarks these models share, against 0 for GPT-5 mini. On price the gap is dramatic: GPT-5 mini works out roughly 6.5x cheaper per blended million tokens. Gemini 3.1 Pro also takes 2M of context versus 400K for GPT-5 mini.
- Which is cheaper, Gemini 3.1 Pro or GPT-5 mini?
- Gemini 3.1 Pro costs $2/$12 per million input/output tokens, while GPT-5 mini costs $0.25/$2. For a typical workload of 10M input and 1.5M output tokens per month, that's $38.00 versus $5.50.
- Which model is better for coding, Gemini 3.1 Pro or GPT-5 mini?
- On SWE-bench Verified — the standard agentic-coding benchmark — Gemini 3.1 Pro scores ~78% versus ~71% for GPT-5 mini, making Gemini 3.1 Pro the stronger pick for coding agents.