# Claude Sonnet 4 vs Gemini 3.1 Flash Lite

> Claude Sonnet 4 and Gemini 3.1 Flash Lite score almost the same on the Noometry Index (40.8 vs 40.8), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/claude-sonnet-4-vs-gemini-3-1-flash-lite
- Last updated: 2026-10-10
- Shared benchmarks: 33

## Summary

- They share 33 benchmarks with published results for both. Claude Sonnet 4 scores higher in 3 categories and Gemini 3.1 Flash Lite in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in multimodal, where Gemini 3.1 Flash Lite leads 39.4 to 26.2.
- The biggest single-benchmark swing is DeepResearch Bench: 46.6% for Claude Sonnet 4 and 37.3% for Gemini 3.1 Flash Lite.
- Gemini 3.1 Flash Lite is cheaper at $0.25 / $1.50 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.
- Gemini 3.1 Flash Lite accepts more context: 1.05M tokens versus 200K.

## Snapshot

| | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 40.8 | 40.8 |
| Rank | 145 | 144 |
| Context | 200K | 1.05M |
| Input $/M | $3 | $0.25 |
| Output $/M | $15 | $1.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Sonnet 4: 43.5 (#88)
- Gemini 3.1 Flash Lite: 37.8 (#188)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| SciCode | 40% | 41.9% |
| WeirdML | 46.1% | 52.2% |
| LMArena Coding | 1414 | 1400 |
| ALE-Bench | 655.35 | 797.73 |
| SWE-bench Verified (bash only) | 64.9% | — |
| Aider Polyglot | 61.3% | — |
| LMArena WebDev | — | 1256 |
| GSO | 4.9% | — |

## Agentic & Tool Use

- Claude Sonnet 4: 38.5 (#31)
- Gemini 3.1 Flash Lite: 30.2 (#79)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| DeepResearch Bench | 46.6% | 37.3% |
| TheAgentCompany | 33.1% | — |
| Cybench | 35% | — |
| OSWorld | 43.9% | — |
| METR Time Horizons | 62% | — |

## Reasoning

- Claude Sonnet 4: 22.9 (#187)
- Gemini 3.1 Flash Lite: 22.9 (#186)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| Kagi LLM Benchmark | 73% | 67.2% |
| CritPt | 0.3% | 1.1% |
| EnigmaEval | 3.1% | 3% |
| LMArena Hard Prompts | 1372 | 1407 |
| DTBench | 77.1% | 76.8% |
| LMCA | 29% | 35% |
| Epoch Capabilities Index | 141.69 | 144.47 |
| ForecastBench | 60.2 | 54.4 |
| ARC-AGI-2 | 5.9% | — |
| SimpleBench | 45.5% | — |
| NYT Connections (extended) | — | 8.2% |
| ARC-AGI-1 | 40% | — |
| Chess Puzzles | — | 25% |
| Thematic Generalization | — | 63.3% |

## Math

- Claude Sonnet 4: 43.3 (#80)
- Gemini 3.1 Flash Lite: 40.7 (#90)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 71.1% | 80% |
| LMArena Math | 1375 | 1428 |
| FrontierMath (Tiers 1-3) | — | 27.7% |
| Omni-MATH | 60.2% | — |
| MATH Level 5 | 84.4% | — |
| FrontierMath (Feb 2025 set) | 4.1% | — |
| FrontierMath Tier 4 (v1) | 0% | — |

## Knowledge

- Claude Sonnet 4: 41.8 (#108)
- Gemini 3.1 Flash Lite: 41.9 (#104)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| GPQA Diamond | 79.2% | 81.8% |
| Humanity's Last Exam | 7.8% | 8.6% |
| Vectara Hallucination Rate | 10.3% | 8.2% |
| LMArena Expert | 1372 | 1398 |
| MMLU-Pro | 84.3% | — |
| Confabulations | 13.2% | — |
| GPQA (HELM) | 70.6% | — |

## Multimodal

- Claude Sonnet 4: 26.2 (#121)
- Gemini 3.1 Flash Lite: 39.4 (#60)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| LMArena Vision | 1191 | 1240 |
| GeoBench | 37% | — |
| VPCT | 34% | — |
| MindCube | 44.8% | — |

## Multilingual

- Claude Sonnet 4: 46.7 (#156)
- Gemini 3.1 Flash Lite: 52.3 (#86)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| LMArena Non-English | 1333 | 1411 |
| LMArena Chinese | 1350 | 1461 |
| LMArena French | 1363 | 1424 |
| LMArena German | 1331 | 1429 |
| LMArena Japanese | 1302 | 1413 |
| LMArena Korean | 1291 | 1392 |
| LMArena Russian | 1355 | 1420 |
| LMArena Spanish | 1357 | 1421 |

## Instruction Following

- Claude Sonnet 4: 71.7 (#145)
- Gemini 3.1 Flash Lite: 72.7 (#131)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| LMArena Instruction Following | 1376 | 1377 |
| IFEval | 84% | — |

## Long Context

- Claude Sonnet 4: 33.7 (#259)
- Gemini 3.1 Flash Lite: 42.5 (#122)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| LMArena Longer Query | 1398 | 1394 |
| Fiction.LiveBench | 46.9% | — |

## Writing & Preference

- Claude Sonnet 4: 57.1 (#132)
- Gemini 3.1 Flash Lite: 60.9 (#94)

| Benchmark | Claude Sonnet 4 | Gemini 3.1 Flash Lite |
|---|---|---|
| LMArena Text | 1351 | 1416 |
| LMArena Creative Writing | 1345 | 1401 |
| LMArena Multi-Turn | 1376 | 1417 |
| Short-Story Creative Writing | 81.4% | — |
| EQ-Bench Creative Writing | 1483 | — |
| WildBench | 83.8% | — |

## FAQ

### Is Claude Sonnet 4 better than Gemini 3.1 Flash Lite?

Claude Sonnet 4 and Gemini 3.1 Flash Lite score almost the same on the Noometry Index (40.8 vs 40.8), so choose on price, context window or the category you care about most.

### Which is cheaper, Claude Sonnet 4 or Gemini 3.1 Flash Lite?

Gemini 3.1 Flash Lite is cheaper. It lists at $0.25 per million input tokens and $1.50 per million output tokens; Claude Sonnet 4 lists at $3 and $15.

### Is Claude Sonnet 4 or Gemini 3.1 Flash Lite better for coding?

Claude Sonnet 4 scores higher on coding benchmarks: 43.5 versus 37.8 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3.1 Flash Lite does, with 1.05M tokens against 200K.

### How many benchmarks do Claude Sonnet 4 and Gemini 3.1 Flash Lite share?

33 benchmarks have published results for both models. Claude Sonnet 4 has 58 scored results on Noometry and Gemini 3.1 Flash Lite has 38.