# Gemini 3.5 Flash vs GLM-5.3

> Gemini 3.5 Flash and GLM-5.3 score almost the same on the Noometry Index (54.2 vs 54.8), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gemini-3-5-flash-vs-glm-5-3
- Last updated: 2026-10-11
- Shared benchmarks: 37

## Summary

- They share 37 benchmarks with published results for both. Gemini 3.5 Flash scores higher in 4 categories and GLM-5.3 in 5 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.5 Flash leads 62.8 to 46.1.
- The biggest single-benchmark swing is DeepSWE: 37.4% for Gemini 3.5 Flash and 69% for GLM-5.3.
- GLM-5.3 is cheaper at $1.40 / $4.40 per million input/output tokens, against $1.50 / $9 for Gemini 3.5 Flash.
- Gemini 3.5 Flash accepts more context: 1.05M tokens versus 1M.
- GLM-5.3 has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| Provider | Google | Z.ai (Zhipu) |
| Noometry Index | 54.2 | 54.8 |
| Rank | 32 | 26 |
| Context | 1.05M | 1M |
| Input $/M | $1.50 | $1.40 |
| Output $/M | $9 | $4.40 |
| Weights | Proprietary | Open |

## Coding

- Gemini 3.5 Flash: 49.4 (#49)
- GLM-5.3: 59.5 (#14)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| DeepSWE | 37.4% | 69% |
| LMArena WebDev | 1499 | 1622 |
| SciCode | 53.1% | 59% |
| WeirdML | 62.6% | 75.4% |
| LMArena Coding | 1492 | 1496 |
| ALE-Bench | 911.02 | 1,317 |
| SWE-bench Verified | 79.3% | — |
| FrontierCode | — | 40.1% |
| CursorBench | — | 42.6% |
| FrontierSWE | — | 30.2% |

## Agentic & Tool Use

- Gemini 3.5 Flash: 24.7 (#114)
- GLM-5.3: 36.4 (#38)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| APEX-Agents | 27.5% | 56.6% |
| Vending-Bench 2 | 5,396 | 8,164 |
| GBAEval | 6.7% | — |
| GDP.pdf | 14% | — |

## Reasoning

- Gemini 3.5 Flash: 62.8 (#18)
- GLM-5.3: 46.1 (#46)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| NYT Connections (extended) | 92.6% | 74.2% |
| CritPt | 13.1% | 19.1% |
| Chess Puzzles | 50% | 21% |
| LMArena Hard Prompts | 1488 | 1489 |
| Mystery Game Puzzles | 32% | 33% |
| DTBench | 94.7% | 87.7% |
| LMCA | 47.1% | 55.5% |
| Epoch Capabilities Index | 154.46 | 155.61 |
| ARC-AGI-2 | 72.1% | — |
| SimpleBench | 76.7% | — |
| ARC-AGI-1 | 92.5% | — |
| EnigmaEval | 25.4% | — |
| EBR-Bench | 4.8% | — |
| Surface Evolver Bench | 58.1% | — |
| Bench to the Future 3 | — | 0.15 |
| ForecastBench | 59 | — |

## Math

- Gemini 3.5 Flash: 60.7 (#36)
- GLM-5.3: 62.3 (#33)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 62.8% | 68.8% |
| FrontierMath Tier 4 | 26.8% | 29.3% |
| OTIS Mock AIME 2024-2025 | 95.6% | 91.1% |
| ProofBench | 31% | 49% |
| LMArena Math | 1504 | 1489 |
| MathArena Final-Answer Competitions | 76.3% | — |
| FrontierMath (Feb 2025 set) | 39% | — |
| FrontierMath Tier 4 (v1) | 14.6% | — |

## Knowledge

- Gemini 3.5 Flash: 66.3 (#11)
- GLM-5.3: 58.3 (#37)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| GPQA Diamond | 92.8% | 90.9% |
| SimpleQA Verified | 66.2% | 41% |
| LMArena Expert | 1495 | 1516 |

## Multimodal

- Gemini 3.5 Flash: 45.7 (#15)
- GLM-5.3: —

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| LMArena Vision | 1310 | — |
| Blueprint-Bench 2 | 33.6% | — |
| LMArena Document | 1463 | — |

## Multilingual

- Gemini 3.5 Flash: 57.0 (#13)
- GLM-5.3: 55.7 (#28)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| LMArena Non-English | 1476 | 1457 |
| LMArena Chinese | 1526 | 1528 |
| LMArena French | 1490 | 1499 |
| LMArena German | 1492 | 1499 |
| LMArena Japanese | 1486 | 1453 |
| LMArena Korean | 1451 | 1472 |
| LMArena Russian | 1493 | 1463 |
| LMArena Spanish | 1480 | 1460 |

## Instruction Following

- Gemini 3.5 Flash: 77.0 (#30)
- GLM-5.3: 77.5 (#23)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| LMArena Instruction Following | 1467 | 1477 |

## Long Context

- Gemini 3.5 Flash: 45.4 (#38)
- GLM-5.3: 45.4 (#41)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| LMArena Longer Query | 1482 | 1482 |

## Writing & Preference

- Gemini 3.5 Flash: 65.5 (#47)
- GLM-5.3: 75.7 (#6)

| Benchmark | Gemini 3.5 Flash | GLM-5.3 |
|---|---|---|
| LMArena Text | 1482 | 1471 |
| LMArena Creative Writing | 1470 | 1457 |
| LMArena Multi-Turn | 1481 | 1472 |
| EQ-Bench Creative Writing | — | 2075 |
| EQ-Bench 4 | 1087 | — |

## FAQ

### Is Gemini 3.5 Flash better than GLM-5.3?

Gemini 3.5 Flash and GLM-5.3 score almost the same on the Noometry Index (54.2 vs 54.8), so choose on price, context window or the category you care about most.

### Which is cheaper, Gemini 3.5 Flash or GLM-5.3?

GLM-5.3 is cheaper. It lists at $1.40 per million input tokens and $4.40 per million output tokens; Gemini 3.5 Flash lists at $1.50 and $9.

### Is Gemini 3.5 Flash or GLM-5.3 better for coding?

GLM-5.3 scores higher on coding benchmarks: 59.5 versus 49.4 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3.5 Flash does, with 1.05M tokens against 1M.

### How many benchmarks do Gemini 3.5 Flash and GLM-5.3 share?

37 benchmarks have published results for both models. Gemini 3.5 Flash has 54 scored results on Noometry and GLM-5.3 has 42.