# Claude 2.1 vs Gemini 3 Flash Preview

> Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 24.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-gemini-3-flash-preview
- Last updated: 2026-10-10
- Shared benchmarks: 6

## Summary

- They share 6 benchmarks with published results for both. Claude 2.1 scores higher in 0 categories and Gemini 3 Flash Preview in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Gemini 3 Flash Preview leads 58.8 to 15.5.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.9% for Claude 2.1 and 95.6% for Gemini 3 Flash Preview.

## Snapshot

| | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 24.9 | 52.3 |
| Rank | 340 | 33 |
| Context | — | 1.05M |
| Input $/M | — | $0.50 |
| Output $/M | — | $3 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 2.1: 25.8 (#322)
- Gemini 3 Flash Preview: 51.5 (#35)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| WeirdML | 7.1% | 61.6% |
| SWE-bench Verified | — | 75.4% |
| SWE-bench Verified (bash only) | — | 75.8% |
| LMArena WebDev | — | 1439 |
| SWE-bench Multilingual | — | 72.7% |
| GSO | — | 9.8% |
| LMArena Coding | — | 1460 |
| ALE-Bench | — | 1,367 |

## Agentic & Tool Use

- Claude 2.1: —
- Gemini 3 Flash Preview: 38.6 (#27)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| Terminal-Bench | — | 64.3% |
| τ²-bench Airline | — | 82.5% |
| τ²-bench Banking | — | 27.3% |
| τ²-bench Retail | — | 76.8% |
| τ²-bench Telecom | — | 91.2% |
| DeepResearch Bench | — | 49.8% |
| BALROG | — | 48.1% |
| GDP.pdf | — | 10% |
| LMArena Search | — | 1198 |
| Vending-Bench 2 | — | 3,635 |

## Reasoning

- Claude 2.1: 20.6 (#216)
- Gemini 3 Flash Preview: 49.2 (#35)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| DTBench | 51% | 89.1% |
| Epoch Capabilities Index | 119.22 | 151.83 |
| ForecastBench | 54.2 | 58.5 |
| ARC-AGI-2 | — | 33.6% |
| SimpleBench | — | 61.1% |
| NYT Connections (extended) | — | 83.1% |
| ARC-AGI-1 | — | 84.7% |
| Chess Puzzles | — | 40% |
| LMArena Hard Prompts | — | 1465 |
| Mystery Game Puzzles | — | 26% |
| LMCA | — | 43.1% |

## Math

- Claude 2.1: 9.6 (#309)
- Gemini 3 Flash Preview: 51.4 (#42)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 95.6% |
| FrontierMath (Tiers 1-3) | — | 51.2% |
| FrontierMath Tier 4 | — | 17.1% |
| MathArena Final-Answer Competitions | — | 67.6% |
| ProofBench | — | 15% |
| LMArena Math | — | 1472 |
| FrontierMath (Feb 2025 set) | — | 35.6% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Claude 2.1: 15.5 (#287)
- Gemini 3 Flash Preview: 58.8 (#30)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| GPQA Diamond | 33% | 89.4% |
| SimpleQA Verified | — | 66.8% |
| Vectara Hallucination Rate | — | 13.5% |
| LMArena Expert | — | 1461 |
| MMLU | 73.5% | — |

## Multimodal

- Claude 2.1: —
- Gemini 3 Flash Preview: 45.3 (#15)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Vision | — | 1285 |
| GeoBench | — | 88% |
| VPCT | — | 72.6% |
| Blueprint-Bench 2 | — | 0% |
| LMArena Document | — | 1413 |

## Multilingual

- Claude 2.1: —
- Gemini 3 Flash Preview: 55.9 (#26)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Non-English | — | 1458 |
| LMArena Chinese | — | 1510 |
| LMArena French | — | 1478 |
| LMArena German | — | 1497 |
| LMArena Japanese | — | 1488 |
| LMArena Korean | — | 1443 |
| LMArena Russian | — | 1480 |
| LMArena Spanish | — | 1470 |

## Instruction Following

- Claude 2.1: —
- Gemini 3 Flash Preview: 75.8 (#52)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Instruction Following | — | 1437 |

## Long Context

- Claude 2.1: —
- Gemini 3 Flash Preview: 44.4 (#63)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Longer Query | — | 1452 |

## Writing & Preference

- Claude 2.1: —
- Gemini 3 Flash Preview: 65.6 (#44)

| Benchmark | Claude 2.1 | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Text | — | 1466 |
| LMArena Creative Writing | — | 1457 |
| LMArena Multi-Turn | — | 1471 |

## FAQ

### Is Claude 2.1 better than Gemini 3 Flash Preview?

Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 24.9 on the Noometry Index.

### Is Claude 2.1 or Gemini 3 Flash Preview better for coding?

Gemini 3 Flash Preview scores higher on coding benchmarks: 51.5 versus 25.8 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and Gemini 3 Flash Preview share?

6 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Gemini 3 Flash Preview has 59.