Gemini 3.1 Pro Preview vs OpenAI o3 Mini

Compare Gemini 3.1 Pro Preview and OpenAI o3 Mini side by side. See pricing, capabilities, context length, and performance. Use both on Krater.ai from $20/mo.

Gemini 3.1 Pro Preview vs OpenAI o3 Mini: strengths, best use cases and how to run both side by side. The live page adds context windows, token pricing and more comparisons once it loads.

Try both on Krater

Run Gemini 3.1 Pro Preview and OpenAI o3 Mini on the same prompt in the Krater Model Arena, then keep the winner in your workflow. One subscription covers both, from $20 a month.

Open Krater chat · Gemini 3.1 Pro Preview on Krater · OpenAI o3 Mini on Krater

What each model is best at

Gemini 3.1 Pro Preview

An incremental update to Gemini 3 Pro with improved performance and stability. Gemini 3.1 Pro Preview refines the capabilities of the Gemini 3 series.

Strengths

  • Refined multimodal performance
  • Improved stability and consistency
  • Enhanced coding capabilities
  • Better instruction following

Best for

  • Production multimodal applications
  • Complex analysis tasks
  • Professional coding assistance
  • Research workflows

OpenAI o3 Mini

OpenAI's newest reasoning model, offering enhanced reasoning capabilities with improved efficiency. o3 Mini represents the next generation of reasoning AI.

Strengths

  • Next-generation reasoning architecture
  • Improved efficiency over o1 series
  • Excellent at complex problem-solving
  • Strong coding and math performance

Best for

  • Advanced reasoning tasks
  • Complex coding challenges
  • Mathematical problem-solving
  • Scientific analysis

How we compare models

Our tested head-to-heads run the same prompt set through both models in the Model Arena, then rank answers blind. Read the testing methodology, or browse every comparison.