Gemini 3.1 Pro vs o4-mini
Pricing, context window, and benchmark comparison · Last updated April 2026
o4-mini is cheaper than Gemini 3.1 Pro at $1.10/1M/1M vs $2.00/1M/1M input tokens — a 1.8x cost difference. Gemini 3.1 Pro scores higher on quality benchmarks (ELO 1410). Choose o4-mini for cost-sensitive workloads; choose Gemini 3.1 Pro for maximum quality.
Which is cheaper: Gemini 3.1 Pro or o4-mini?
o4-mini is the cheaper option at $1.10/1M per 1M input tokens, compared to $2.00/1M for Gemini 3.1 Pro. That is a 1.8x cost difference on input tokens. Output pricing follows a similar pattern: Gemini 3.1 Pro charges $12.00/1M/1M vs $4.40/1M/1M for o4-mini.
Which has better quality: Gemini 3.1 Pro or o4-mini?
Based on LMSYS Chatbot Arena rankings, Gemini 3.1 Pro achieves a higher ELO score (1410 vs 1350), suggesting stronger performance on open-ended tasks. Gemini 3.1 Pro excels at google's latest flagship with major reasoning improvements. o4-mini is known for cheapest reasoning model in the openai lineup.
Which should you choose: Gemini 3.1 Pro or o4-mini?
- → Google's latest flagship with major reasoning improvements
- → 1M token context window
- → Native multimodal (text, image, video, audio)
- → Cheapest reasoning model in the OpenAI lineup
- → Strong performance on code and math for the price
- → 200K context window
Frequently Asked Questions
Which is cheaper: Gemini 3.1 Pro or o4-mini?
o4-mini is cheaper at $1.10/1M per 1M input tokens, making it 1.8x more affordable.
Which has better quality: Gemini 3.1 Pro or o4-mini?
Gemini 3.1 Pro scores higher on the LMSYS Chatbot Arena with an ELO of 1410, suggesting better overall quality for most tasks.
Which has a larger context window: Gemini 3.1 Pro or o4-mini?
Gemini 3.1 Pro has a larger context window at 1000K tokens.
Should I choose Gemini 3.1 Pro or o4-mini?
Choose o4-mini if cost is the priority. Choose Gemini 3.1 Pro if benchmark quality is most important. Consider your specific use case: Gemini 3.1 Pro is best for reasoning and long-context, while o4-mini excels at reasoning and coding.
Is Gemini 3.1 Pro or o4-mini open source?
Gemini 3.1 Pro is proprietary. o4-mini is proprietary.