Gemini 3.1 Pro vs o3
Pricing, context window, and benchmark comparison · Last updated April 2026
o3 is cheaper than Gemini 3.1 Pro at $2.00/1M/1M vs $2.00/1M/1M input tokens. Gemini 3.1 Pro scores higher on quality benchmarks (ELO 1410). Choose o3 for cost-sensitive workloads; choose Gemini 3.1 Pro for maximum quality.
Which is cheaper: Gemini 3.1 Pro or o3?
Gemini 3.1 Pro and o3 are identically priced at $2.00/1M per 1M input tokens. Output pricing follows a similar pattern: Gemini 3.1 Pro charges $12.00/1M/1M vs $8.00/1M/1M for o3.
Which has better quality: Gemini 3.1 Pro or o3?
Based on LMSYS Chatbot Arena rankings, Gemini 3.1 Pro achieves a higher ELO score (1410 vs 1395), suggesting stronger performance on open-ended tasks. Gemini 3.1 Pro excels at google's latest flagship with major reasoning improvements. o3 is known for top-tier reasoning on math, science, and agentic tasks.
Which should you choose: Gemini 3.1 Pro or o3?
- → Google's latest flagship with major reasoning improvements
- → 1M token context window
- → Native multimodal (text, image, video, audio)
- → Top-tier reasoning on math, science, and agentic tasks
- → 87% cheaper than original o1 at the same capability tier
- → 200K context window
Frequently Asked Questions
Which is cheaper: Gemini 3.1 Pro or o3?
Gemini 3.1 Pro and o3 have the same input price of $2.00/1M per 1M tokens.
Which has better quality: Gemini 3.1 Pro or o3?
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 o3?
Gemini 3.1 Pro has a larger context window at 1000K tokens.
Should I choose Gemini 3.1 Pro or o3?
Choose o3 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 o3 excels at reasoning and math.
Is Gemini 3.1 Pro or o3 open source?
Gemini 3.1 Pro is proprietary. o3 is proprietary.