Why is this comparison indexable?

It has 6 verifiable comparison points, and both models have pricing or benchmark data.

Are missing metrics invented?

No. Metrics without LMSpeed data are omitted from this report.

Back to models

Data points: 88

Model compare

Gemini 3.1 Flash Lite vs GPT-4o

The readout for Gemini 3.1 Flash Lite and GPT-4o, before the detailed comparison sheet.

Model A

Gemini 3.1 Flash Lite

Google

Leading

vs

Model B

GPT-4o

OpenAI

Contender

Key Takeaways

Weighted outcome: Gemini 3.1 Flash Lite. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Decision read

Gemini 3.1 Flash Lite

Gemini 3.1 Flash Lite has the higher weighted result; Model A / B score 52 to 48.

Evidence depth

88 data points

Includes 9 benchmark rows, 1 audit samples, and 7 provider examples.

Selection signal

Start with Gemini 3.1 Flash Lite

The charts below split 17 high-signal samples across speed, scores, and audit health.

Change comparison

Switch either side of this report to compare another model with the same LMSpeed data pipeline.

Model AModel B

Comparison sheet

This report only uses LMSpeed data for Gemini 3.1 Flash Lite and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare	Gemini 3.1 Flash Lite	GPT-4o
Overall leader	Leading	Contender
Weighted overall score	52.0 pts	48.0 pts
Benchmark category leads	3 categories	2 categories
Operational advantages	Average speed	Cheapest input price, First-token latency, Free providers, Provider coverage
Context window	1.0M tokens	128K tokens
Max output	65.5K tokens	16.4K tokens
Modalities	Input TextImagevideoFileAudio

The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.

Model metadata

Model compare	Gemini 3.1 Flash Lite	GPT-4o
Developer	Google	OpenAI
Released	May 2026	Nov 2024
Parameters	No data	No data
Tokenizer	Gemini	GPT
Knowledge cutoff	No data	2023-10-31
OpenRouter ID	google/gemini-3.1-flash-lite	openai/gpt-4o
References	No data	No data

When to choose each model

This report only uses LMSpeed data for Gemini 3.1 Flash Lite and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Gemini 3.1 Flash Lite

Gemini 3.1 Flash Lite is stronger in benchmark categories (Agents, Reasoning, Instruction following) and operational dimensions (Average speed).

GPT-4o

GPT-4o is stronger in benchmark categories (Coding, Knowledge) and operational dimensions (Cheapest input price, First-token latency, Free providers, Provider coverage).

Benchmark score comparison

Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.

Category performance

Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.

Model A coverage: 6 / 8
Model B coverage: 6 / 8
Shared: 5 shared categories

Avg. score

Gemini 3.1 Flash Lite

46.7

Avg. score

GPT-4o

43.2

Agents

Gemini 3.1 Flash Lite leads by 3.5

Gemini 3.1 Flash Lite42.6

GPT-4o39.1

Coding

GPT-4o leads by 5.4

Gemini 3.1 Flash Lite40.9

GPT-4o46.3

Reasoning

Gemini 3.1 Flash Lite leads by 12.2

Gemini 3.1 Flash Lite52.7

GPT-4o40.5

Knowledge

GPT-4o leads by 1.2

Gemini 3.1 Flash Lite48.5

GPT-4o49.7

Math

GPT-4o

Gemini 3.1 Flash Lite-

GPT-4o42.2

Multilingual

No data

Gemini 3.1 Flash Lite-

GPT-4o-

Multimodal

Gemini 3.1 Flash Lite

Gemini 3.1 Flash Lite39.5

GPT-4o-

Instruction following

31.3

Rank #73/84 · confidence 1 · eval date 2026-03-03

+6.2

GPT-4o

25.1

Rank #75/84 · confidence 1 · eval date 2024-05-13

API audit comparison

Latest completed audits from shared providers, with four safety and integrity score groups plus report links.

Provider	Gemini 3.1 Flash Lite	GPT-4o
Winner: Gemini 3.1 Flash Lite	Gemini 3.1 Flash Lite gemini-3.1-flash-lite Audit score 89 1006886100	GPT-4o gpt-4o No audit yet

Provider examples

Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.

Provider	Gemini 3.1 Flash Lite	GPT-4o
20 tests	Gemini 3.1 Flash Lite speed / latency N/A / N/A input / output No data	GPT-4o speed / latency 88 tok/s / 1593ms input / output No data
15 tests	Gemini 3.1 Flash Lite speed / latency 218 tok/s / 4094ms input / output No data	GPT-4o speed / latency N/A / N/A input / output No data
10 tests	Gemini 3.1 Flash Lite speed / latency N/A / N/A input / output No data	GPT-4o speed / latency 57 tok/s / 3381ms input / output No data
5 tests	Gemini 3.1 Flash Lite speed / latency N/A / N/A input / output No data	GPT-4o speed / latency 48 tok/s / 13138ms input / output No data
5 tests	Gemini 3.1 Flash Lite speed / latency 59 tok/s / 25230ms input / output No data	GPT-4o speed / latency N/A / N/A input / output No data
	Gemini 3.1 Flash Lite gemini-3.1-flash-lite-preview speed / latency No data input / output $0/request	GPT-4o gpt-4o-2024-05-13 speed / latency No data input / output $0/request
	Gemini 3.1 Flash Lite gemini-3.1-flash-lite-preview speed / latency No data input / output $0.010/M/$0.062/M	GPT-4o gpt-4o-2024-05-13 speed / latency No data input / output $3.08/M

FAQ

Weighted outcome: Gemini 3.1 Flash Lite. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Why is this comparison indexable?: It has 6 verifiable comparison points, and both models have pricing or benchmark data.
Are missing metrics invented?: No. Metrics without LMSpeed data are omitted from this report.

Output

Text

Features	Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning	Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search