# Gemini 3.5 Flash Lite vs GPT-5

> GPT-5 is the stronger model overall, scoring 50.9 to 41.5 on the Noometry Index. Gemini 3.5 Flash Lite costs 4.0× less per token, which makes it the better buy when GPT-5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-3-5-flash-lite-vs-gpt-5
- Last updated: 2026-10-10
- Shared benchmarks: 36

## Summary

- They share 36 benchmarks with published results for both. Gemini 3.5 Flash Lite scores higher in 3 categories and GPT-5 in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5 leads 55.0 to 25.9.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 26% for Gemini 3.5 Flash Lite and 55.4% for GPT-5.
- Gemini 3.5 Flash Lite is cheaper at $0.30 / $2.50 per million input/output tokens, against $1.25 / $10 for GPT-5.
- Gemini 3.5 Flash Lite accepts more context: 1.05M tokens versus 400K.

## Snapshot

| | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 41.5 | 50.9 |
| Rank | 133 | 45 |
| Context | 1.05M | 400K |
| Input $/M | $0.30 | $1.25 |
| Output $/M | $2.50 | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.5 Flash Lite: 42.4 (#104)
- GPT-5: 50.3 (#47)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| LMArena WebDev | 1440 | 1418 |
| SciCode | 41.3% | 42.9% |
| WeirdML | 39% | 60.7% |
| LMArena Coding | 1453 | 1436 |
| ALE-Bench | 765.27 | 1,162 |
| SWE-bench Verified | — | 73.6% |
| SWE-bench Verified (bash only) | — | 65% |
| Aider Polyglot | — | 88% |
| GSO | — | 6.9% |
| AlgoTune | — | 1.67 |

## Agentic & Tool Use

- Gemini 3.5 Flash Lite: 25.7 (#107)
- GPT-5: 33.1 (#56)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| Terminal-Bench | — | 49.6% |
| APEX-Agents | 29.3% | — |
| GDPval | — | 34.8% |
| Remote Labor Index | — | 1.7% |
| DeepResearch Bench | — | 49.6% |
| BALROG | — | 32.8% |
| GDP.pdf | 10% | — |
| LMArena Search | — | 1133 |
| METR Time Horizons | — | 69.6% |

## Reasoning

- Gemini 3.5 Flash Lite: 27.8 (#114)
- GPT-5: 38.3 (#64)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| ARC-AGI-2 | 10.3% | 9.9% |
| ARC-AGI-1 | 53.5% | 65.7% |
| CritPt | 0% | 12.6% |
| Chess Puzzles | 22% | 37% |
| LMArena Hard Prompts | 1441 | 1416 |
| Mystery Game Puzzles | 19% | 23% |
| DTBench | 83.5% | 90.7% |
| LMCA | 37.6% | 40% |
| Epoch Capabilities Index | 145.13 | 150 |
| SimpleBench | — | 56.7% |
| Kagi LLM Benchmark | — | 72.7% |
| NYT Connections (extended) | 60.4% | — |
| EnigmaEval | — | 10.5% |
| EBR-Bench | — | 12.7% |
| ForecastBench | — | 61.4 |

## Math

- Gemini 3.5 Flash Lite: 25.9 (#264)
- GPT-5: 55.0 (#44)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 26% | 55.4% |
| FrontierMath Tier 4 | 0% | 22% |
| OTIS Mock AIME 2024-2025 | 71.1% | 91.4% |
| ProofBench | 13% | 18% |
| LMArena Math | 1433 | 1407 |
| Omni-MATH | — | 64.7% |
| MATH Level 5 | — | 98.1% |
| FrontierMath (Feb 2025 set) | — | 32.4% |
| FrontierMath Tier 4 (v1) | — | 12.5% |

## Knowledge

- Gemini 3.5 Flash Lite: 50.1 (#72)
- GPT-5: 56.6 (#43)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| GPQA Diamond | 83.3% | 86.2% |
| LMArena Expert | 1435 | 1419 |
| Humanity's Last Exam | — | 25.3% |
| SimpleQA Verified | — | 50.1% |
| MMLU-Pro | — | 86.3% |
| Confabulations | — | 10.3% |
| Vectara Hallucination Rate | — | 14.7% |
| GPQA (HELM) | — | 79.2% |

## Multimodal

- Gemini 3.5 Flash Lite: 41.1 (#40)
- GPT-5: 46.8 (#13)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| LMArena Vision | 1268 | 1232 |
| GeoBench | — | 81% |
| VPCT | — | 66% |

## Multilingual

- Gemini 3.5 Flash Lite: 53.5 (#63)
- GPT-5: 51.4 (#110)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| LMArena Non-English | 1427 | 1397 |
| LMArena Chinese | 1469 | 1422 |
| LMArena French | 1451 | 1410 |
| LMArena German | 1454 | 1416 |
| LMArena Japanese | 1427 | 1409 |
| LMArena Korean | 1407 | 1360 |
| LMArena Russian | 1443 | 1406 |
| LMArena Spanish | 1442 | 1399 |

## Instruction Following

- Gemini 3.5 Flash Lite: 74.8 (#85)
- GPT-5: 73.8 (#113)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| LMArena Instruction Following | 1420 | 1388 |
| IFEval | — | 87.5% |

## Long Context

- Gemini 3.5 Flash Lite: 43.9 (#84)
- GPT-5: 69.5 (#2)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| LMArena Longer Query | 1435 | 1399 |
| Fiction.LiveBench | — | 97.2% |

## Writing & Preference

- Gemini 3.5 Flash Lite: 64.2 (#57)
- GPT-5: 63.4 (#65)

| Benchmark | Gemini 3.5 Flash Lite | GPT-5 |
|---|---|---|
| LMArena Text | 1435 | 1406 |
| LMArena Creative Writing | 1420 | 1365 |
| EQ-Bench Creative Writing | 1559 | 1627 |
| LMArena Multi-Turn | 1445 | 1426 |
| Short-Story Creative Writing | — | 86% |
| WildBench | — | 85.7% |

## FAQ

### Is Gemini 3.5 Flash Lite better than GPT-5?

GPT-5 is the stronger model overall, scoring 50.9 to 41.5 on the Noometry Index. Gemini 3.5 Flash Lite costs 4.0× less per token, which makes it the better buy when GPT-5's lead doesn't matter for your workload.

### Which is cheaper, Gemini 3.5 Flash Lite or GPT-5?

Gemini 3.5 Flash Lite is cheaper. It lists at $0.30 per million input tokens and $2.50 per million output tokens; GPT-5 lists at $1.25 and $10.

### Is Gemini 3.5 Flash Lite or GPT-5 better for coding?

GPT-5 scores higher on coding benchmarks: 50.3 versus 42.4 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3.5 Flash Lite does, with 1.05M tokens against 400K.

### How many benchmarks do Gemini 3.5 Flash Lite and GPT-5 share?

36 benchmarks have published results for both models. Gemini 3.5 Flash Lite has 39 scored results on Noometry and GPT-5 has 69.