# Gemini 2.5 Flash vs Nemotron 3.5 Lightning

> Gemini 2.5 Flash and Nemotron 3.5 Lightning score almost the same on the Noometry Index (39.0 vs 39.3), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gemini-2-5-flash-vs-nemotron-3-5-lightning
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 5 categories and Nemotron 3.5 Lightning in 3 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where Gemini 2.5 Flash leads 52.5 to 44.0.
- Nemotron 3.5 Lightning is cheaper at $0.06 / $0.16 per million input/output tokens, against $0.30 / $2.50 for Gemini 2.5 Flash.
- Gemini 2.5 Flash accepts more context: 1.05M tokens versus 262K.
- Nemotron 3.5 Lightning has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| Provider | Google | NVIDIA |
| Noometry Index | 39.0 | 39.3 |
| Rank | 162 | 156 |
| Context | 1.05M | 262K |
| Input $/M | $0.30 | $0.06 |
| Output $/M | $2.50 | $0.16 |
| Weights | Proprietary | Open |

## Coding

- Gemini 2.5 Flash: 35.5 (#210)
- Nemotron 3.5 Lightning: 39.6 (#143)

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Coding | 1424 | 1370 |
| SWE-bench Verified (bash only) | 28.7% | — |
| Aider Polyglot | 55.1% | — |
| WeirdML | 41.9% | — |
| ALE-Bench | 661.88 | — |

## Agentic & Tool Use

- Gemini 2.5 Flash: 30.6 (#67)
- Nemotron 3.5 Lightning: —

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| Terminal-Bench | 17.1% | — |
| Berkeley Function Calling Leaderboard | 56.2% | — |
| TheAgentCompany | 41.1% | — |
| BALROG | 33.5% | — |
| Vending-Bench 2 | 548.84 | — |

## Reasoning

- Gemini 2.5 Flash: 18.2 (#271)
- Nemotron 3.5 Lightning: 25.7 (#128)

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Hard Prompts | 1422 | 1335 |
| ARC-AGI-2 | 2.5% | — |
| SimpleBench | 41.2% | — |
| Kagi LLM Benchmark | 56.8% | — |
| ARC-AGI-1 | 33.3% | — |
| CritPt | 1.1% | — |
| EnigmaEval | 2.7% | — |
| DTBench | 76.5% | — |
| LMCA | 27.5% | — |
| Epoch Capabilities Index | 143.04 | — |
| ForecastBench | 60.6 | — |

## Math

- Gemini 2.5 Flash: 38.1 (#87)
- Nemotron 3.5 Lightning: 34.7 (#156)

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Math | 1415 | 1355 |
| OTIS Mock AIME 2024-2025 | 73.1% | — |
| Omni-MATH | 38.5% | — |
| FrontierMath (Feb 2025 set) | 4.8% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Gemini 2.5 Flash: 36.1 (#162)
- Nemotron 3.5 Lightning: 36.9 (#154)

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Expert | 1426 | 1354 |
| 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)
- Nemotron 3.5 Lightning: —

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

## Multilingual

- Gemini 2.5 Flash: 52.5 (#83)
- Nemotron 3.5 Lightning: 44.0 (#175)

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Non-English | 1410 | 1292 |
| LMArena Chinese | 1450 | 1356 |
| LMArena French | 1433 | 1369 |
| LMArena German | 1419 | 1280 |
| LMArena Japanese | 1403 | 1213 |
| LMArena Korean | 1385 | 1233 |
| LMArena Russian | 1415 | 1257 |
| LMArena Spanish | 1421 | 1321 |

## Instruction Following

- Gemini 2.5 Flash: 75.9 (#50)
- Nemotron 3.5 Lightning: 69.8 (#166)

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Instruction Following | 1405 | 1317 |
| IFEval | 89.8% | — |

## Long Context

- Gemini 2.5 Flash: 47.5 (#16)
- Nemotron 3.5 Lightning: 39.9 (#160)

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Longer Query | 1419 | 1312 |
| Fiction.LiveBench | 77.8% | — |

## Writing & Preference

- Gemini 2.5 Flash: 54.0 (#153)
- Nemotron 3.5 Lightning: 48.5 (#198)

| Benchmark | Gemini 2.5 Flash | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Text | 1417 | 1324 |
| LMArena Creative Writing | 1400 | 1254 |
| EQ-Bench Creative Writing | 1137 | 1280 |
| LMArena Multi-Turn | 1408 | 1327 |
| Short-Story Creative Writing | 76.5% | — |
| WildBench | 81.7% | — |

## FAQ

### Is Gemini 2.5 Flash better than Nemotron 3.5 Lightning?

Gemini 2.5 Flash and Nemotron 3.5 Lightning score almost the same on the Noometry Index (39.0 vs 39.3), so choose on price, context window or the category you care about most.

### Which is cheaper, Gemini 2.5 Flash or Nemotron 3.5 Lightning?

Nemotron 3.5 Lightning is cheaper. It lists at $0.06 per million input tokens and $0.16 per million output tokens; Gemini 2.5 Flash lists at $0.30 and $2.50.

### Is Gemini 2.5 Flash or Nemotron 3.5 Lightning better for coding?

Nemotron 3.5 Lightning scores higher on coding benchmarks: 39.6 versus 35.5 in the Noometry coding category.

### Which has the bigger context window?

Gemini 2.5 Flash does, with 1.05M tokens against 262K.

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

18 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and Nemotron 3.5 Lightning has 18.