# Gemini 3.1 Flash Lite vs GPT-4o

> Gemini 3.1 Flash Lite is the stronger model overall, scoring 40.4 to 28.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-1-flash-lite-vs-gpt-4o
- Last updated: 2026-10-10
- Shared benchmarks: 31

## Summary

- They share 31 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 10 categories and GPT-4o in 0 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 3.1 Flash Lite leads 39.5 to 10.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 80% for Gemini 3.1 Flash Lite and 6.4% for GPT-4o.
- Gemini 3.1 Flash Lite is cheaper at $0.25 / $1.50 per million input/output tokens, against $2.50 / $10 for GPT-4o.
- Gemini 3.1 Flash Lite accepts more context: 1.05M tokens versus 128K.

## Snapshot

| | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 40.4 | 28.5 |
| Rank | 141 | 316 |
| Context | 1.05M | 128K |
| Input $/M | $0.25 | $2.50 |
| Output $/M | $1.50 | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.1 Flash Lite: 37.5 (#179)
- GPT-4o: 25.1 (#323)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| WeirdML | 52.2% | 25.1% |
| LMArena Coding | 1400 | 1297 |
| SWE-bench Verified | — | 31% |
| SWE-bench Verified (bash only) | — | 21.6% |
| Aider Polyglot | — | 45.3% |
| LMArena WebDev | 1256 | — |
| SciCode | 41.9% | — |
| GSO | — | 0% |
| BigCodeBench Instruct | — | 51.1% |
| LiveBench Coding | — | 51.4% |
| BigCodeBench Complete | — | 61.1% |
| CadEval | — | 26% |
| ALE-Bench | 797.73 | — |
| HumanEval+ | — | 87.2% |
| MBPP+ | — | 72.2% |

## Agentic & Tool Use

- Gemini 3.1 Flash Lite: 29.9 (#72)
- GPT-4o: 20.8 (#133)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| GDPval | — | 9.9% |
| TheAgentCompany | — | 8.6% |
| Cybench | — | 12.5% |
| DeepResearch Bench | 37.3% | — |
| BALROG | — | 32.3% |
| LMArena Search | — | 1006 |
| METR Time Horizons | — | 40.8% |

## Reasoning

- Gemini 3.1 Flash Lite: 22.3 (#181)
- GPT-4o: 9.4 (#338)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| CritPt | 1.1% | 0% |
| Chess Puzzles | 25% | 13% |
| EnigmaEval | 3% | 0.8% |
| LMArena Hard Prompts | 1407 | 1281 |
| DTBench | 76.8% | 64.5% |
| LMCA | 35% | 16.6% |
| Epoch Capabilities Index | 144.45 | 128.97 |
| ForecastBench | 54.4 | 57.7 |
| ARC-AGI-2 | — | 0% |
| SimpleBench | — | 17.8% |
| Kagi LLM Benchmark | 67.2% | — |
| NYT Connections (extended) | 8.2% | — |
| ARC-AGI-1 | — | 4.5% |
| Thematic Generalization | 63.3% | — |
| LiveBench Reasoning | — | 55.8% |
| LiveBench Data Analysis | — | 60.9% |
| LiveBench | — | 55.3% |

## Math

- Gemini 3.1 Flash Lite: 39.5 (#82)
- GPT-4o: 10.2 (#303)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| FrontierMath (Tiers 1-3) | 27.7% | 0.4% |
| OTIS Mock AIME 2024-2025 | 80% | 6.4% |
| LMArena Math | 1427 | 1285 |
| Omni-MATH | — | 29.3% |
| LiveBench Math | — | 49.5% |
| MATH Level 5 | — | 53.3% |
| FrontierMath (Feb 2025 set) | — | 0.3% |

## Knowledge

- Gemini 3.1 Flash Lite: 41.7 (#95)
- GPT-4o: 28.8 (#235)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| GPQA Diamond | 81.8% | 49.2% |
| Humanity's Last Exam | 8.6% | 2.7% |
| Vectara Hallucination Rate | 8.2% | 9.6% |
| LMArena Expert | 1397 | 1250 |
| SimpleQA Verified | — | 26% |
| MMLU-Pro | — | 71.3% |
| Confabulations | — | 15.3% |
| GPQA (HELM) | — | 52% |
| MMLU | — | 88.1% |

## Multimodal

- Gemini 3.1 Flash Lite: 38.7 (#57)
- GPT-4o: 33.9 (#85)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| LMArena Vision | 1240 | 1137 |
| Video-MME | — | 71.9% |
| GeoBench | — | 71% |
| VPCT | — | 40% |
| ScienceQA | — | 88.5% |

## Multilingual

- Gemini 3.1 Flash Lite: 52.5 (#82)
- GPT-4o: 43.4 (#181)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| LMArena Non-English | 1410 | 1283 |
| LMArena Chinese | 1461 | 1277 |
| LMArena French | 1423 | 1303 |
| LMArena German | 1429 | 1282 |
| LMArena Japanese | 1411 | 1257 |
| LMArena Korean | 1393 | 1234 |
| LMArena Russian | 1420 | 1286 |
| LMArena Spanish | 1420 | 1292 |

## Instruction Following

- Gemini 3.1 Flash Lite: 72.9 (#126)
- GPT-4o: 66.8 (#202)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| LMArena Instruction Following | 1376 | 1278 |
| LiveBench Instruction Following | — | 68.6% |
| IFEval | — | 81.7% |

## Long Context

- Gemini 3.1 Flash Lite: 42.5 (#117)
- GPT-4o: 39.4 (#174)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| LMArena Longer Query | 1394 | 1289 |
| Fiction.LiveBench | — | 66.7% |

## Writing & Preference

- Gemini 3.1 Flash Lite: 61.0 (#90)
- GPT-4o: 52.8 (#160)

| Benchmark | Gemini 3.1 Flash Lite | GPT-4o |
|---|---|---|
| LMArena Text | 1416 | 1300 |
| LMArena Creative Writing | 1401 | 1291 |
| LMArena Multi-Turn | 1417 | 1302 |
| Short-Story Creative Writing | — | 81.8% |
| WildBench | — | 82.8% |
| LiveBench Language | — | 47.6% |

## FAQ

### Is Gemini 3.1 Flash Lite better than GPT-4o?

Gemini 3.1 Flash Lite is the stronger model overall, scoring 40.4 to 28.5 on the Noometry Index.

### Which is cheaper, Gemini 3.1 Flash Lite or GPT-4o?

Gemini 3.1 Flash Lite is cheaper. It lists at $0.25 per million input tokens and $1.50 per million output tokens; GPT-4o lists at $2.50 and $10.

### Is Gemini 3.1 Flash Lite or GPT-4o better for coding?

Gemini 3.1 Flash Lite scores higher on coding benchmarks: 37.5 versus 25.1 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3.1 Flash Lite does, with 1.05M tokens against 128K.

### How many benchmarks do Gemini 3.1 Flash Lite and GPT-4o share?

31 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and GPT-4o has 72.