Gemini 3.1 Flash Lite vs o4 MiniBenchmark Comparison 2026

Objective comparison based on public benchmarks updated weekly: Intelligence Index, GPQA Diamond, Chatbot Arena ELO, pricing and speed.

Overall winner (2026)

Gemini 3.1 Flash Lite

6 of 7 criteria won

Google

Gemini 3.1 Flash Lite

Winner

Intelligence Index

33.5

Coding Index

68.5

6 criteria won

View full profile

OpenAI

o4 Mini

Intelligence Index

33.1

Coding Index

25.6

1 criterion won

View full profile

Detailed Comparison

CritérioGemini 3.1 Flash Liteo4 Mini
Chatbot Arena ELO
Intelligence Index (AA)33.533.1
Coding Index (AA)68.525.6
GPQA Diamond82.2%78.0%
Input price ($/1M tok)$0.25$1.10
Output price ($/1M tok)$1.50$4.40
Context window1.0M tokens200K tokens
Speed (tokens/s)179 tok/s

✓ = winner in this criterion • Source: Artificial Analysis, LMArena, official APIs • Updated weekly

Technical Specifications

Gemini 3.1 Flash Lite

Company
Google
Context window
1.0M tokens
Input ($/1M tok)
$0.25
Output ($/1M tok)
$1.50
Release
May 2026
Multimodal
Yes
Open Source
No
Official website
Visit

o4 Mini

Company
OpenAI
Context window
200K tokens
Input ($/1M tok)
$1.10
Output ($/1M tok)
$4.40
Speed
179 tok/s
Release
Apr 2025
Multimodal
Yes
Open Source
No
Official website
Visit

When to use Gemini 3.1 Flash Lite vs o4 Mini?

Choosing between Gemini 3.1 Flash Lite and o4 Mini depends on your use case, budget and technical requirements. Below, a practical guide based on benchmark data and each model's specifications.

Use Gemini 3.1 Flash Lite when:

Google · Multimodal

  • High-volume token projects — at $0.25/1M input tokens, the cost per call is low enough for production use at scale
  • Processing images, PDFs and visual documents alongside text — useful for analyzing contracts, reports with charts and mixed content
  • Long document analysis — 1.0M tokens context window allows processing books, legal databases and extensive logs
  • API integration in SaaS applications — direct API access with documented SLA
View full Gemini 3.1 Flash Lite profile

Use o4 Mini when:

OpenAI · Multimodal

  • Complex reasoning, math and advanced programming — reasoning models are optimized for problems requiring multiple logical steps
  • High-volume token projects — at $1.1/1M input tokens, the cost per call is low enough for production use at scale
  • Processing images, PDFs and visual documents alongside text — useful for analyzing contracts, reports with charts and mixed content
  • Long document analysis — 200K tokens context window allows processing books, legal databases and extensive logs
  • AI agents with tool calling — workflow automation, external API integration and data pipelines
  • API integration in SaaS applications — direct API access with documented SLA
View full o4 Mini profile
SWEN Verdict: Gemini 3.1 Flash Lite wins in more objective criteria in this comparison (6 vs 1). For most use cases, Gemini 3.1 Flash Lite offers better aggregate performance — but o4 Mini may be preferable if your project prioritizes complex reasoning, math and advanced programming.

Frequently Asked Questions

Gemini 3.1 Flash Lite or o4 Mini: which is better?

Gemini 3.1 Flash Lite wins in 6 of 7 criteria analyzed. Check the full table to choose based on your use case.

Where does this benchmark data come from?

Data is aggregated from Artificial Analysis (Intelligence Index, Coding Index) and Chatbot Arena/LMArena (ELO). Pricing and specs come from official APIs. Updated weekly.

What is the Intelligence Index?

The Intelligence Index is an aggregate score from Artificial Analysis that combines multiple academic benchmarks (MMLU, GPQA, LiveBench, etc.) into a single rating. The higher the score, the more capable the model is at reasoning tasks.

Is Gemini 3.1 Flash Lite cheaper than o4 Mini?

Yes. Gemini 3.1 Flash Lite costs $0.25/1M input tokens, while o4 Mini costs $1.1/1M tokens — 340% more expensive. For high-volume projects, Gemini 3.1 Flash Lite represents significant savings. Total cost also depends on output pricing and your application's usage pattern.

Gemini 3.1 Flash Lite or o4 Mini: which has a larger context window?

Gemini 3.1 Flash Lite has the larger context window: 1.0M tokens vs 200K tokens. For long document analysis, extensive transcripts or full codebases, the larger context window is a decisive criterion.

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