# Gemini 2.5 Flash vs Gemini 3.5 Flash Lite

> Gemini 3.5 Flash Lite is the stronger model overall, scoring 41.8 to 39.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-2-5-flash-vs-gemini-3-5-flash-lite
- Last updated: 2026-10-10
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 5 categories and Gemini 3.5 Flash Lite in 5 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Gemini 3.5 Flash Lite leads 50.0 to 36.1.
- The biggest single-benchmark swing is ARC-AGI-1: 33.3% for Gemini 2.5 Flash and 53.5% for Gemini 3.5 Flash Lite.
- Both cost about the same: $0.30 input and $2.50 output per million tokens.

## Snapshot

| | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 39.0 | 41.8 |
| Rank | 162 | 113 |
| Context | 1.05M | 1.05M |
| Input $/M | $0.30 | $0.30 |
| Output $/M | $2.50 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 2.5 Flash: 35.5 (#210)
- Gemini 3.5 Flash Lite: 42.1 (#96)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| WeirdML | 41.9% | 39% |
| LMArena Coding | 1424 | 1455 |
| ALE-Bench | 661.88 | 765.27 |
| SWE-bench Verified (bash only) | 28.7% | — |
| Aider Polyglot | 55.1% | — |
| LMArena WebDev | — | 1440 |
| SciCode | — | 41.3% |

## Agentic & Tool Use

- Gemini 2.5 Flash: 30.6 (#67)
- Gemini 3.5 Flash Lite: 28.6 (#82)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| Terminal-Bench | 17.1% | — |
| Berkeley Function Calling Leaderboard | 56.2% | — |
| TheAgentCompany | 41.1% | — |
| BALROG | 33.5% | — |
| GDP.pdf | — | 10% |
| Vending-Bench 2 | 548.84 | — |

## Reasoning

- Gemini 2.5 Flash: 18.2 (#271)
- Gemini 3.5 Flash Lite: 27.8 (#95)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| ARC-AGI-2 | 2.5% | 10.3% |
| ARC-AGI-1 | 33.3% | 53.5% |
| CritPt | 1.1% | 0% |
| LMArena Hard Prompts | 1422 | 1441 |
| DTBench | 76.5% | 83.5% |
| LMCA | 27.5% | 37.6% |
| Epoch Capabilities Index | 143.04 | 145.12 |
| SimpleBench | 41.2% | — |
| Kagi LLM Benchmark | 56.8% | — |
| NYT Connections (extended) | — | 60.4% |
| Chess Puzzles | — | 22% |
| EnigmaEval | 2.7% | — |
| Mystery Game Puzzles | — | 19% |
| ForecastBench | 60.6 | — |

## Math

- Gemini 2.5 Flash: 38.1 (#87)
- Gemini 3.5 Flash Lite: 25.7 (#245)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 73.1% | 71.1% |
| LMArena Math | 1415 | 1431 |
| FrontierMath (Tiers 1-3) | — | 26% |
| FrontierMath Tier 4 | — | 0% |
| ProofBench | — | 13% |
| Omni-MATH | 38.5% | — |
| FrontierMath (Feb 2025 set) | 4.8% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Gemini 2.5 Flash: 36.1 (#162)
- Gemini 3.5 Flash Lite: 50.0 (#66)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Expert | 1426 | 1430 |
| GPQA Diamond | — | 83.3% |
| Humanity's Last Exam | 12.1% | — |
| MMLU-Pro | 63.9% | — |
| Confabulations | 16.8% | — |
| Vectara Hallucination Rate | 7.8% | — |
| GPQA (HELM) | 39% | — |

## Multimodal

- Gemini 2.5 Flash: 41.2 (#31)
- Gemini 3.5 Flash Lite: 40.3 (#38)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Vision | 1254 | 1266 |
| GeoBench | 76% | — |
| VPCT | 46.2% | — |
| SpatialViz-Bench | 36.9% | — |

## Multilingual

- Gemini 2.5 Flash: 52.5 (#83)
- Gemini 3.5 Flash Lite: 53.8 (#59)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Non-English | 1410 | 1428 |
| LMArena Chinese | 1450 | 1467 |
| LMArena French | 1433 | 1452 |
| LMArena German | 1419 | 1454 |
| LMArena Japanese | 1403 | 1428 |
| LMArena Korean | 1385 | 1406 |
| LMArena Russian | 1415 | 1443 |
| LMArena Spanish | 1421 | 1440 |

## Instruction Following

- Gemini 2.5 Flash: 75.9 (#50)
- Gemini 3.5 Flash Lite: 75.0 (#77)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Instruction Following | 1405 | 1420 |
| IFEval | 89.8% | — |

## Long Context

- Gemini 2.5 Flash: 47.5 (#16)
- Gemini 3.5 Flash Lite: 43.8 (#80)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Longer Query | 1419 | 1435 |
| Fiction.LiveBench | 77.8% | — |

## Writing & Preference

- Gemini 2.5 Flash: 54.0 (#153)
- Gemini 3.5 Flash Lite: 64.4 (#55)

| Benchmark | Gemini 2.5 Flash | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Text | 1417 | 1436 |
| LMArena Creative Writing | 1400 | 1419 |
| EQ-Bench Creative Writing | 1137 | 1559 |
| LMArena Multi-Turn | 1408 | 1445 |
| Short-Story Creative Writing | 76.5% | — |
| WildBench | 81.7% | — |

## FAQ

### Is Gemini 2.5 Flash better than Gemini 3.5 Flash Lite?

Gemini 3.5 Flash Lite is the stronger model overall, scoring 41.8 to 39.0 on the Noometry Index.

### Which is cheaper, Gemini 2.5 Flash or Gemini 3.5 Flash Lite?

Gemini 3.5 Flash Lite is cheaper. It lists at $0.30 per million input tokens and $2.50 per million output tokens; Gemini 2.5 Flash lists at $0.30 and $2.50.

### Is Gemini 2.5 Flash or Gemini 3.5 Flash Lite better for coding?

Gemini 3.5 Flash Lite scores higher on coding benchmarks: 42.1 versus 35.5 in the Noometry coding category.

### Which has the bigger context window?

Both accept 1.05M tokens.

### How many benchmarks do Gemini 2.5 Flash and Gemini 3.5 Flash Lite share?

28 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and Gemini 3.5 Flash Lite has 38.