# Gemini 2.5 Flash-Lite vs Grok 4.3

> Grok 4.3 is the stronger model overall, scoring 43.6 to 36.4 on the Noometry Index. Gemini 2.5 Flash-Lite costs 8.9× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-2-5-flash-lite-vs-grok-4-3
- Last updated: 2026-10-10
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Gemini 2.5 Flash-Lite scores higher in 1 category and Grok 4.3 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 32.1.
- The biggest single-benchmark swing is DTBench: 62.8% for Gemini 2.5 Flash-Lite and 90.7% for Grok 4.3.
- Gemini 2.5 Flash-Lite is cheaper at $0.10 / $0.40 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Gemini 2.5 Flash-Lite accepts more context: 1.05M tokens versus 1M.

## Snapshot

| | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 36.4 | 43.6 |
| Rank | 208 | 80 |
| Context | 1.05M | 1M |
| Input $/M | $0.10 | $1.25 |
| Output $/M | $0.40 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 2.5 Flash-Lite: 38.0 (#167)
- Grok 4.3: 41.3 (#117)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| WeirdML | 35.2% | 49.9% |
| LMArena Coding | 1373 | 1415 |
| ALE-Bench | 325.9 | 944.17 |
| LMArena WebDev | — | 1357 |
| SciCode | — | 47.3% |

## Agentic & Tool Use

- Gemini 2.5 Flash-Lite: 27.8 (#89)
- Grok 4.3: 27.6 (#93)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| Berkeley Function Calling Leaderboard | 36.9% | — |
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |
| Vending-Bench 2 | — | 35.26 |

## Reasoning

- Gemini 2.5 Flash-Lite: 21.5 (#196)
- Grok 4.3: 34.9 (#60)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| LMArena Hard Prompts | 1377 | 1397 |
| DTBench | 62.8% | 90.7% |
| LMCA | 18.1% | 38.3% |
| Epoch Capabilities Index | 133.93 | 149.13 |
| Kagi LLM Benchmark | 40.5% | — |
| NYT Connections (extended) | — | 55.2% |
| CritPt | — | 8% |
| Chess Puzzles | — | 25% |
| ForecastBench | — | 60.3 |

## Math

- Gemini 2.5 Flash-Lite: 35.5 (#144)
- Grok 4.3: 45.8 (#60)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| LMArena Math | 1373 | 1388 |
| FrontierMath (Tiers 1-3) | — | 42.8% |
| FrontierMath Tier 4 | — | 14.6% |
| OTIS Mock AIME 2024-2025 | — | 93.3% |
| ProofBench | — | 11% |
| Omni-MATH | 48% | — |

## Knowledge

- Gemini 2.5 Flash-Lite: 32.1 (#206)
- Grok 4.3: 52.5 (#57)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| LMArena Expert | 1373 | 1385 |
| GPQA Diamond | — | 88.8% |
| SimpleQA Verified | — | 33.2% |
| MMLU-Pro | 53.7% | — |
| Vectara Hallucination Rate | 3.3% | — |
| GPQA (HELM) | 30.9% | — |

## Multimodal

- Gemini 2.5 Flash-Lite: 28.6 (#109)
- Grok 4.3: 31.6 (#96)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| LMArena Vision | 1198 | 1231 |
| VPCT | 30% | — |
| Blueprint-Bench 2 | — | 0% |

## Multilingual

- Gemini 2.5 Flash-Lite: 49.5 (#129)
- Grok 4.3: 50.7 (#114)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1369 | 1385 |
| LMArena Chinese | 1404 | 1423 |
| LMArena French | 1388 | 1412 |
| LMArena German | 1390 | 1395 |
| LMArena Japanese | 1359 | 1379 |
| LMArena Korean | 1358 | 1357 |
| LMArena Russian | 1373 | 1399 |
| LMArena Spanish | 1396 | 1402 |

## Instruction Following

- Gemini 2.5 Flash-Lite: 70.2 (#163)
- Grok 4.3: 72.3 (#135)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1366 | 1366 |
| IFEval | 81% | — |

## Long Context

- Gemini 2.5 Flash-Lite: 33.3 (#257)
- Grok 4.3: 42.5 (#118)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1373 | 1393 |
| Fiction.LiveBench | 47.2% | — |

## Writing & Preference

- Gemini 2.5 Flash-Lite: 57.0 (#130)
- Grok 4.3: 58.6 (#112)

| Benchmark | Gemini 2.5 Flash-Lite | Grok 4.3 |
|---|---|---|
| LMArena Text | 1379 | 1397 |
| LMArena Creative Writing | 1366 | 1380 |
| LMArena Multi-Turn | 1367 | 1406 |
| WildBench | 81.8% | — |
| EQ-Bench 4 | — | 1075 |

## FAQ

### Is Gemini 2.5 Flash-Lite better than Grok 4.3?

Grok 4.3 is the stronger model overall, scoring 43.6 to 36.4 on the Noometry Index. Gemini 2.5 Flash-Lite costs 8.9× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.

### Which is cheaper, Gemini 2.5 Flash-Lite or Grok 4.3?

Gemini 2.5 Flash-Lite is cheaper. It lists at $0.10 per million input tokens and $0.40 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.

### Is Gemini 2.5 Flash-Lite or Grok 4.3 better for coding?

Grok 4.3 scores higher on coding benchmarks: 41.3 versus 38.0 in the Noometry coding category.

### Which has the bigger context window?

Gemini 2.5 Flash-Lite does, with 1.05M tokens against 1M.

### How many benchmarks do Gemini 2.5 Flash-Lite and Grok 4.3 share?

23 benchmarks have published results for both models. Gemini 2.5 Flash-Lite has 33 scored results on Noometry and Grok 4.3 has 40.