Gemini 3 Pro vs OpenAI o4-mini
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Gemini 3 Pro
73.6Google · Nov 2025
Google's November 2025 frontier breakout — 91.9% GPQA Diamond and 37.5% HLE made it the reasoning leader of its generation.
OpenAI o4-mini
80.9OpenAI · Apr 2025
A compact reasoning model that punched far above its price on math — 92.7% on AIME 2025 at $1.10 per million input tokens.
The verdict
Gemini 3 Pro wins 4 of the 4 benchmarks these models share, against 0 for OpenAI o4-mini. OpenAI o4-mini is about 2.3x cheaper per blended million tokens (3:1 input:output mix). Gemini 3 Pro also takes 1M of context versus 200K for OpenAI o4-mini.
Benchmark head-to-head 4–0
Specs & pricing
| Gemini 3 Pro | OpenAI o4-mini | |
|---|---|---|
| modhub Index | 73.6 | 80.9 |
| Input price / 1M | $2 | $1.1 |
| Output price / 1M | $12 | $4.4 |
| Context window | 1M | 200K |
| Max output | 66K | 100K |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image, audio, video | text, image |
| Knowledge cutoff | Jan 2025 | May 2024 |
| Released | Nov 2025 | Apr 2025 |
| Example monthly cost* | $38.00 | $17.60 |
* 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 Pro or OpenAI o4-mini?
- Gemini 3 Pro wins 4 of the 4 benchmarks these models share, against 0 for OpenAI o4-mini. OpenAI o4-mini is about 2.3x cheaper per blended million tokens (3:1 input:output mix). Gemini 3 Pro also takes 1M of context versus 200K for OpenAI o4-mini.
- Which is cheaper, Gemini 3 Pro or OpenAI o4-mini?
- Gemini 3 Pro costs $2/$12 per million input/output tokens, while OpenAI o4-mini costs $1.1/$4.4. For a typical workload of 10M input and 1.5M output tokens per month, that's $38.00 versus $17.60.
- Which model is better for coding, Gemini 3 Pro or OpenAI o4-mini?
- On SWE-bench Verified — the standard agentic-coding benchmark — Gemini 3 Pro scores 76.2% versus 68.1% for OpenAI o4-mini, making Gemini 3 Pro the stronger pick for coding agents.