# Gemini 3.6 Flash vs GPT-5.5 Instant

> Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 42.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-6-flash-vs-gpt-5-5-instant
- Last updated: 2026-10-12
- Shared benchmarks: 27

## Summary

- They share 27 benchmarks with published results for both. Gemini 3.6 Flash scores higher in 8 categories and GPT-5.5 Instant in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.6 Flash leads 58.8 to 24.9.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 58.9% for Gemini 3.6 Flash and 26.3% for GPT-5.5 Instant.

## Snapshot

| | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 54.1 | 42.7 |
| Rank | 33 | 110 |
| Context | 1.05M | — |
| Input $/M | $0.75 | — |
| Output $/M | $3.75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.6 Flash: 50.0 (#48)
- GPT-5.5 Instant: 44.3 (#74)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| SciCode | 52.7% | 48.6% |
| LMArena Coding | 1491 | 1433 |
| DeepSWE | 46.7% | — |
| FrontierCode | 34.4% | — |
| LMArena WebDev | 1538 | — |
| WeirdML | 56.1% | — |
| ALE-Bench | 715.52 | — |

## Agentic & Tool Use

- Gemini 3.6 Flash: 32.3 (#65)
- GPT-5.5 Instant: —

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| APEX-Agents | 46.9% | — |
| GDP.pdf | 14% | — |

## Reasoning

- Gemini 3.6 Flash: 58.8 (#22)
- GPT-5.5 Instant: 24.9 (#155)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| CritPt | 10.6% | 0% |
| Chess Puzzles | 43% | 12% |
| LMArena Hard Prompts | 1485 | 1426 |
| Epoch Capabilities Index | 154.25 | 142.52 |
| ARC-AGI-2 | 60.4% | — |
| NYT Connections (extended) | 89% | — |
| ARC-AGI-1 | 91.2% | — |
| Mystery Game Puzzles | 30% | — |
| DTBench | 95.5% | — |
| LMCA | 44.9% | — |

## Math

- Gemini 3.6 Flash: 57.3 (#40)
- GPT-5.5 Instant: 26.5 (#259)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| FrontierMath (Tiers 1-3) | 58.9% | 26.3% |
| FrontierMath Tier 4 | 22% | 2.4% |
| OTIS Mock AIME 2024-2025 | 94.2% | 68.1% |
| LMArena Math | 1505 | 1420 |
| MathArena Final-Answer Competitions | 70.8% | — |
| ProofBench | 36% | — |

## Knowledge

- Gemini 3.6 Flash: 67.8 (#8)
- GPT-5.5 Instant: 48.9 (#74)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| GPQA Diamond | 94.1% | 82.5% |
| LMArena Expert | 1488 | 1409 |
| SimpleQA Verified | 66.2% | — |

## Multimodal

- Gemini 3.6 Flash: 38.5 (#64)
- GPT-5.5 Instant: 40.0 (#52)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | 1298 | 1250 |
| LMArena Document | 1456 | 1403 |
| Blueprint-Bench 2 | 31.2% | — |
| Furniture Assembly | 23.3% | — |

## Multilingual

- Gemini 3.6 Flash: 56.5 (#19)
- GPT-5.5 Instant: 52.8 (#80)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | 1469 | 1417 |
| LMArena Chinese | 1531 | 1456 |
| LMArena French | 1504 | 1428 |
| LMArena German | 1478 | 1411 |
| LMArena Japanese | 1476 | 1408 |
| LMArena Korean | 1431 | 1392 |
| LMArena Russian | 1487 | 1431 |
| LMArena Spanish | 1475 | 1429 |

## Instruction Following

- Gemini 3.6 Flash: 77.0 (#33)
- GPT-5.5 Instant: 74.2 (#100)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1466 | 1406 |

## Long Context

- Gemini 3.6 Flash: 45.1 (#50)
- GPT-5.5 Instant: 43.4 (#96)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | 1474 | 1422 |

## Writing & Preference

- Gemini 3.6 Flash: 68.2 (#27)
- GPT-5.5 Instant: 61.8 (#85)

| Benchmark | Gemini 3.6 Flash | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | 1479 | 1419 |
| LMArena Creative Writing | 1465 | 1419 |
| LMArena Multi-Turn | 1481 | 1433 |
| EQ-Bench Creative Writing | 1604 | — |

## FAQ

### Is Gemini 3.6 Flash better than GPT-5.5 Instant?

Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 42.7 on the Noometry Index.

### Is Gemini 3.6 Flash or GPT-5.5 Instant better for coding?

Gemini 3.6 Flash scores higher on coding benchmarks: 50.0 versus 44.3 in the Noometry coding category.

### How many benchmarks do Gemini 3.6 Flash and GPT-5.5 Instant share?

27 benchmarks have published results for both models. Gemini 3.6 Flash has 46 scored results on Noometry and GPT-5.5 Instant has 27.