Pairwise benchmark snapshot · Aug 16, 2026noindex (thin pair)

Google: Gemini 3.1 Flash Lite vs GPT-5 mini benchmark

Name: Google: Gemini 3.1 Flash Lite vs GPT-5 mini AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Google: Gemini 3.1 Flash Lite (Google) and GPT-5 mini (OpenAI) using the latest snapshots we have as of Aug 16, 2026. Google: Gemini 3.1 Flash Lite wins on output price at $1.5/1M. Google: Gemini 3.1 Flash Lite has the larger context window (1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

Share Analysis:

WhatsApp Telegram X / Post LinkedIn Reddit

Google

Google: Gemini 3.1 Flash Lite

Auto-discovered from OpenRouter (google/gemini-3.1-flash-lite). Preview until a second source matches.

$1.5/1M out

OpenAI

GPT-5 mini

Cost-efficient GPT-5 distill for high-volume agents.

Elo 1,410$2/1M out

Swap or Add Any Model to this Matchup

Instant pairwise benchmark recalculation across 400+ LLMs

Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Google: Gemini 3.1 Flash Lite (2)vsGPT-5 mini (7)

Google: Gemini 3.1 Flash Lite: 2W (22%)Overall: GPT-5 miniGPT-5 mini: 7W (78%)

← Google: Gemini 3.1 Flash Lite1 tiesGPT-5 mini →

GPT-5 mini (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

—vs1,410

Coding Elo

—vs1,395

SWE-bench

—vs52.4%

LiveBench

—vs61.2%

GPQA Diamond

—vs72%

Google: Gemini 3.1 Flash Lite: 0WGPT-5 mini: 5W

GPT-5 mini (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

—vs155 tok/s

Time to first token

—vs140 ms

Google: Gemini 3.1 Flash Lite: 0WGPT-5 mini: 2W

Google: Gemini 3.1 Flash Lite (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$1.5/1Mvs$2/1M

Input price

$0.25/1Mvs$0.25/1M

Context window

1Mvs400k

Google: Gemini 3.1 Flash Lite: 2WGPT-5 mini: 0W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageGPT-5 mini 4/6

Preference Elo

No shared data

Throughput Speed

No shared data

Price Efficiency

Google: Gemini 3.1 Flash Lite

$0.50/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

—

EloHigh is better

1,410

Code Elo

High is better

—

Code EloHigh is better

1,395

LiveBench

High is better

—

LiveBenchHigh is better

61.2%

SWE-bench

High is better

—

SWE-benchHigh is better

52.4%

GPQA

High is better

—

GPQAHigh is better

72%

TTFT

Low is better

—

TTFTLow is better

140 ms

Speed

High is better

—

SpeedHigh is better

155 tok/s

In $

Low is better

$0.25/1M

In $Low is better

$0.25/1M

Out $

Low is better

+33%$1.5/1M

Out $Low is better

$2/1M

Context

High is better

+162%1M

ContextHigh is better

400k

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 19% with Google: Gemini 3.1 Flash Lite

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Google: Gemini 3.1 Flash Lite$31.25 / mo

In: $8.75Out: $22.50

GPT-5 mini$38.75 / mo

In: $8.75Out: $30.00

Estimated Cost Delta

Google: Gemini 3.1 Flash Lite is estimated to save $7.50/month ($90/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Google: Gemini 3.1 Flash Lite:Pick Google: Gemini 3.1 Flash Lite when you are optimizing output cost.
2
Google: Gemini 3.1 Flash Lite:Pick Google: Gemini 3.1 Flash Lite for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatGoogle: Gemini 3.1 Flash Lite

Lower output list price ($1.5/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGoogle: Gemini 3.1 Flash Lite

Larger window (1M).

Screenshots / visionGPT-5 mini

GPT-5 mini is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Google: Gemini 3.1 Flash Lite	Lower output list price ($1.5/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Google: Gemini 3.1 Flash Lite	Larger window (1M).
Screenshots / vision	GPT-5 mini	GPT-5 mini is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

launchAug 8, 2025

GPT-5 mini: the 2025 distill still useful as a cheap OpenAI baseline

High-volume agents that cannot pay Sol. Compare to Luna before you assume the new cheap SKU wins.

Community Sentiment

Cast Your Matchup Vote

0 total votes

Community Discussions (0)

No comments posted on this matchup yet. Be the first to share an evaluation note!

Share card

The real PNG is generated at /compare/gemini-3-1-flash-lite-vs-gpt-5-mini/opengraph-image for crawlers.

PNG

CompareLLM Matrix

Verified head-to-head card

LIVE

Google

Google: Gemini 3.1 Flash Lite

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost$1.5/1M

OpenAI

GPT-5 mini

Elo 1,410

LiveBench61.2%

SWE-bench52.4%

Speed155 tok/s

Output cost$2/1M

Frequently Asked Questions

Which is better overall, Google: Gemini 3.1 Flash Lite or GPT-5 mini?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Google: Gemini 3.1 Flash Lite or GPT-5 mini?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: Google: Gemini 3.1 Flash Lite output tokens are $1.5/1M versus $2/1M. Input prices and retry rates still move the real bill.
Which is faster, Google: Gemini 3.1 Flash Lite or GPT-5 mini?: We do not have TTFT for both models.
Which has the larger context window?: Google: Gemini 3.1 Flash Lite accepts 1M tokens versus 400k.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Google: Gemini 3.1 Flash Lite and GPT-5 mini Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Google: Gemini 3.1 Flash Lite matchups →|All GPT-5 mini matchups →

GPT-5 mini vs OpenAI: o3 Mini (previous gpt-mini)GPT-5 mini vs GPT-5.6 Luna (next gpt-mini)GPT-5 vs GPT-5 mini Gemini 3 Pro vs GPT-5 mini Gemini 3 Flash vs GPT-5 mini GPT-4.5 Orion vs GPT-5 mini

Google: Gemini 3.1 Flash Lite vs GPT-5 mini benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Google: Gemini 3.1 Flash Lite (2)vsGPT-5 mini (7)

Google: Gemini 3.1 Flash Lite: 2W (22%)Overall: GPT-5 miniGPT-5 mini: 7W (78%)

← Google: Gemini 3.1 Flash Lite1 tiesGPT-5 mini →

GPT-5 mini (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

—vs1,410

Coding Elo

—vs1,395

SWE-bench

—vs52.4%

LiveBench

—vs61.2%

GPQA Diamond

—vs72%

Google: Gemini 3.1 Flash Lite: 0WGPT-5 mini: 5W

GPT-5 mini (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

—vs155 tok/s

Time to first token

—vs140 ms

Google: Gemini 3.1 Flash Lite: 0WGPT-5 mini: 2W

Google: Gemini 3.1 Flash Lite (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$1.5/1Mvs$2/1M

Input price

$0.25/1Mvs$0.25/1M

Context window

1Mvs400k

Google: Gemini 3.1 Flash Lite: 2WGPT-5 mini: 0W

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatGoogle: Gemini 3.1 Flash Lite

Lower output list price ($1.5/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGoogle: Gemini 3.1 Flash Lite

Larger window (1M).

Screenshots / visionGPT-5 mini

GPT-5 mini is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Google: Gemini 3.1 Flash Lite	Lower output list price ($1.5/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Google: Gemini 3.1 Flash Lite	Larger window (1M).
Screenshots / vision	GPT-5 mini	GPT-5 mini is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, Google: Gemini 3.1 Flash Lite or GPT-5 mini?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, Google: Gemini 3.1 Flash Lite or GPT-5 mini?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

Google: Gemini 3.1 Flash Lite output tokens are $1.5/1M versus $2/1M. Input prices and retry rates still move the real bill.

Which is faster, Google: Gemini 3.1 Flash Lite or GPT-5 mini?

We do not have TTFT for both models.

Which has the larger context window?

Google: Gemini 3.1 Flash Lite accepts 1M tokens versus 400k.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Google: Gemini 3.1 Flash Lite and GPT-5 mini Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

Google: Gemini 3.1 Flash Lite

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

GPT-5 mini: the 2025 distill still useful as a cheap OpenAI baseline

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Google: Gemini 3.1 Flash Lite

GPT-5 mini

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

Google: Gemini 3.1 Flash Lite

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

GPT-5 mini: the 2025 distill still useful as a cheap OpenAI baseline

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Google: Gemini 3.1 Flash Lite

GPT-5 mini

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons