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Gemini 3.1 Pro vs GPT Mini (120b)

At a glance
GoogleGemini 3.1 Pro

Google's frontier model with a large leap in core reasoning.

861.0M ctx$2.00/$12.00 per M#10/92
OpenAIGPT Mini (120b)

OpenAI's budget-friendly reasoning model — fast and surprisingly capable.

73131K ctx$0.04/$0.18 per M#49/92
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
GoogleGemini 3.1 Pro
Reasoning
Sources:Epoch ECI·Epoch AI·Provider·OpenRouter· as of 2026-07-10
Smarter
Capability
CapabilityECI86.4
Reasoning & Knowledge
Graduate Science94.1%Expert-Level46.4%Factual Recall77.3%
Math
Competition Math95.6%Research Math36.9%
Coding
Real-World Coding80.6%Code Editing—
Agentic
Terminal Tasks80.2%Novel Reasoning77.1%Task Horizon6.4h
OpenAIGPT Mini (120b)
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI73.2
Reasoning & Knowledge
Graduate Science—Expert-Level—Factual Recall—
Math
Competition Math—Research Math—
Coding
Real-World Coding—Code Editing41.8%
Agentic
Terminal Tasks18.7%Novel Reasoning—Task Horizon42min
Specs
GoogleGemini 3.1 Pro
1.0M
Context
66K
Max output
Feb 2026
Released
OpenAIGPT Mini (120b)
131K
Context
16K
Max output
Aug 2025
Released
Capabilities
GoogleGemini 3.1 Pro
Vision
Audio
Reasoning
OpenAIGPT Mini (120b)
Vision
Audio
Reasoning
Pricing
GoogleGemini 3.1 Pro
Live pricing, shown before you run
Input$2.00/M tokens
Output$12.00/M tokens
Reasoning$12.00/M tokens
Cache read$0.20/M tokens
Cache write$0.38/M tokens
Image input$2.00/M tokens
Audio input$2.00/M tokens
Web search$0.01/search
OpenAIGPT Mini (120b)
Live pricing, shown before you run
Input$0.04/M tokens
Output$0.18/M tokens
Chat with Gemini 3.1 ProGo to model
Chat with GPT Mini (120b)Go to model
Frequently Asked Questions: Gemini 3.1 Pro vs GPT Mini (120b)▼

Which is better, Gemini 3.1 Pro or GPT Mini (120b)?

▼

Based on the Capability Index, Gemini 3.1 Pro scores higher (86.4 vs 73.2). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, Gemini 3.1 Pro or GPT Mini (120b)?

▼

GPT Mini (120b) has a lower blended cost. Gemini 3.1 Pro: $2.00 input / $12.00 output. GPT Mini (120b): $0.04 input / $0.18 output.

Which has a larger context window, Gemini 3.1 Pro or GPT Mini (120b)?

▼

Gemini 3.1 Pro has a larger context window: Gemini 3.1 Pro supports 1M tokens vs GPT Mini (120b) at 131K tokens.

Do both Gemini 3.1 Pro and GPT Mini (120b) support vision?

▼

Gemini 3.1 Pro supports vision/image input, but GPT Mini (120b) does not.

What are the key differences between Gemini 3.1 Pro and GPT Mini (120b)?

▼

Key differences: Gemini 3.1 Pro has a notably higher capability index (13.2 point gap); GPT Mini (120b) is significantly cheaper; only Gemini 3.1 Pro supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Gemini 3.1 Pro and GPT Mini (120b) for free on idapt.app to see which performs better for your specific needs.

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