# Claude Opus 4 vs Gemini 1.5 Flash 8B

> Claude Opus 4 is the stronger model overall, scoring 42.9 to 29.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-vs-gemini-1-5-flash-8b
- Last updated: 2026-10-10
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. Claude Opus 4 scores higher in 9 categories and Gemini 1.5 Flash 8B in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4 leads 43.9 to 16.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 64.4% for Claude Opus 4 and 4.6% for Gemini 1.5 Flash 8B.

## Snapshot

| | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 42.9 | 29.7 |
| Rank | 93 | 292 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4: 47.8 (#55)
- Gemini 1.5 Flash 8B: 34.9 (#221)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Coding | 1442 | 1218 |
| SWE-bench Verified | 70.7% | — |
| SWE-bench Verified (bash only) | 67.6% | — |
| Aider Polyglot | 72% | — |
| GSO | 6.9% | — |
| WeirdML | 43.7% | — |
| AlgoTune | 1.33 | — |

## Agentic & Tool Use

- Claude Opus 4: 34.5 (#39)
- Gemini 1.5 Flash 8B: —

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| Cybench | 38% | — |
| DeepResearch Bench | 46.8% | — |
| LMArena Search | 1127 | — |
| METR Time Horizons | 63.9% | — |

## Reasoning

- Claude Opus 4: 27.4 (#104)
- Gemini 1.5 Flash 8B: 19.2 (#242)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1210 |
| DTBench | 81.6% | 50% |
| ARC-AGI-2 | 8.6% | — |
| SimpleBench | 58.8% | — |
| Kagi LLM Benchmark | 74.3% | — |
| ARC-AGI-1 | 35.7% | — |
| CritPt | 0.3% | — |
| EnigmaEval | 5.6% | — |
| LMCA | 37.4% | — |
| Epoch Capabilities Index | 142.67 | — |
| ForecastBench | 61.1 | — |

## Math

- Claude Opus 4: 40.2 (#80)
- Gemini 1.5 Flash 8B: 13.3 (#296)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 64.4% | 4.6% |
| LMArena Math | 1391 | 1207 |
| Omni-MATH | 61.6% | — |
| MATH Level 5 | 85% | — |
| FrontierMath (Feb 2025 set) | 4.5% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4: 43.9 (#82)
- Gemini 1.5 Flash 8B: 16.0 (#285)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| GPQA Diamond | 76.3% | 33% |
| LMArena Expert | 1384 | 1185 |
| Humanity's Last Exam | 10.7% | — |
| MMLU-Pro | 87.5% | — |
| Confabulations | 15.9% | — |
| Vectara Hallucination Rate | 12% | — |
| GPQA (HELM) | 70.8% | — |

## Multimodal

- Claude Opus 4: 30.9 (#101)
- Gemini 1.5 Flash 8B: 27.6 (#110)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Vision | 1192 | 1044 |
| GeoBench | 49% | — |
| VPCT | 38% | — |

## Multilingual

- Claude Opus 4: 49.0 (#133)
- Gemini 1.5 Flash 8B: 38.6 (#224)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Non-English | 1362 | 1215 |
| LMArena Chinese | 1386 | 1231 |
| LMArena French | 1370 | 1233 |
| LMArena German | 1391 | 1206 |
| LMArena Japanese | 1332 | 1150 |
| LMArena Korean | 1318 | 1140 |
| LMArena Russian | 1392 | 1236 |
| LMArena Spanish | 1388 | 1212 |

## Instruction Following

- Claude Opus 4: 77.3 (#26)
- Gemini 1.5 Flash 8B: 63.1 (#231)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Instruction Following | 1406 | 1199 |
| IFEval | 91.8% | — |

## Long Context

- Claude Opus 4: 39.5 (#167)
- Gemini 1.5 Flash 8B: 36.9 (#220)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Longer Query | 1422 | 1219 |
| Fiction.LiveBench | 61.1% | — |

## Writing & Preference

- Claude Opus 4: 61.4 (#85)
- Gemini 1.5 Flash 8B: 43.0 (#227)

| Benchmark | Claude Opus 4 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Text | 1377 | 1226 |
| LMArena Creative Writing | 1386 | 1218 |
| LMArena Multi-Turn | 1396 | 1185 |
| Short-Story Creative Writing | 83.6% | — |
| EQ-Bench Creative Writing | 1580 | — |
| WildBench | 85.2% | — |

## FAQ

### Is Claude Opus 4 better than Gemini 1.5 Flash 8B?

Claude Opus 4 is the stronger model overall, scoring 42.9 to 29.7 on the Noometry Index.

### Is Claude Opus 4 or Gemini 1.5 Flash 8B better for coding?

Claude Opus 4 scores higher on coding benchmarks: 47.8 versus 34.9 in the Noometry coding category.

### How many benchmarks do Claude Opus 4 and Gemini 1.5 Flash 8B share?

21 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and Gemini 1.5 Flash 8B has 21.