# Claude Opus 4.1 vs Gemini 1.5 Flash (May 2024)

> Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 33.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-gemini-1-5-flash
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. Claude Opus 4.1 scores higher in 9 categories and Gemini 1.5 Flash (May 2024) in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.1 leads 42.0 to 26.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 68.9% for Claude Opus 4.1 and 16.3% for Gemini 1.5 Flash (May 2024).

## Snapshot

| | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 41.0 | 33.2 |
| Rank | 142 | 246 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.1: 44.4 (#73)
- Gemini 1.5 Flash (May 2024): 34.4 (#236)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| WeirdML | 45.9% | 24.9% |
| LMArena Coding | 1479 | 1261 |
| SWE-bench Verified | 73.3% | — |
| LMArena WebDev | 1390 | — |
| BigCodeBench Instruct | — | 43.5% |
| BigCodeBench Complete | — | 55.1% |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |
| HumanEval+ | — | 75.6% |
| MBPP+ | — | 67.5% |

## Agentic & Tool Use

- Claude Opus 4.1: 35.0 (#41)
- Gemini 1.5 Flash (May 2024): 26.6 (#102)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| Terminal-Bench | 38% | — |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| BALROG | — | 14.6% |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |

## Reasoning

- Claude Opus 4.1: 32.2 (#76)
- Gemini 1.5 Flash (May 2024): 21.7 (#215)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1257 |
| DTBench | 80% | 53.8% |
| Epoch Capabilities Index | 144.12 | 129.36 |
| ForecastBench | 62 | 53.9 |
| SimpleBench | 60% | — |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| LMCA | 37.1% | — |
| PIQA | — | 87.5% |

## Math

- Claude Opus 4.1: 22.3 (#277)
- Gemini 1.5 Flash (May 2024): 22.1 (#281)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 68.9% | 16.3% |
| LMArena Math | 1431 | 1269 |
| FrontierMath (Feb 2025 set) | 7.2% | 0% |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| Omni-MATH | — | 30.4% |
| MATH Level 5 | — | 61.9% |
| FrontierMath Tier 4 (v1) | 4.2% | — |
| GSM8K | — | 82.4% |

## Knowledge

- Claude Opus 4.1: 42.0 (#101)
- Gemini 1.5 Flash (May 2024): 26.2 (#260)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| GPQA Diamond | 77.3% | 47.3% |
| LMArena Expert | 1439 | 1233 |
| Humanity's Last Exam | 11.5% | — |
| MMLU-Pro | — | 67.8% |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |
| GPQA (HELM) | — | 43.7% |
| BoolQ | — | 85.8% |
| MMLU | — | 77.9% |

## Multimodal

- Claude Opus 4.1: 26.8 (#119)
- Gemini 1.5 Flash (May 2024): 36.0 (#81)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Vision | — | 1141 |
| Video-MME | — | 70.3% |
| GeoBench | — | 76% |
| VPCT | 35% | — |

## Multilingual

- Claude Opus 4.1: 52.0 (#95)
- Gemini 1.5 Flash (May 2024): 42.9 (#189)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Non-English | 1405 | 1278 |
| LMArena Chinese | 1427 | 1295 |
| LMArena French | 1431 | 1258 |
| LMArena German | 1413 | 1262 |
| LMArena Japanese | 1378 | 1252 |
| LMArena Korean | 1380 | 1221 |
| LMArena Russian | 1422 | 1288 |
| LMArena Spanish | 1448 | 1243 |

## Instruction Following

- Claude Opus 4.1: 75.6 (#58)
- Gemini 1.5 Flash (May 2024): 66.8 (#205)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Instruction Following | 1435 | 1258 |
| IFEval | — | 83.1% |

## Long Context

- Claude Opus 4.1: 44.5 (#63)
- Gemini 1.5 Flash (May 2024): 39.0 (#187)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Longer Query | 1455 | 1284 |

## Writing & Preference

- Claude Opus 4.1: 62.4 (#74)
- Gemini 1.5 Flash (May 2024): 48.7 (#196)

| Benchmark | Claude Opus 4.1 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Text | 1419 | 1287 |
| LMArena Creative Writing | 1412 | 1285 |
| LMArena Multi-Turn | 1444 | 1253 |
| Short-Story Creative Writing | 84.7% | — |
| WildBench | — | 79.2% |

## FAQ

### Is Claude Opus 4.1 better than Gemini 1.5 Flash (May 2024)?

Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 33.2 on the Noometry Index.

### Is Claude Opus 4.1 or Gemini 1.5 Flash (May 2024) better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 34.4 in the Noometry coding category.

### How many benchmarks do Claude Opus 4.1 and Gemini 1.5 Flash (May 2024) share?

24 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Gemini 1.5 Flash (May 2024) has 42.