Noometry

Model comparison

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.

Last verified . 37 shared benchmarks.

Gemini 3.5 Flash Google

54.2

Rank #32 Confirmed

GLM-5.3 Z.ai (Zhipu)

54.8

Rank #26 Confirmed

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.

Side by side

Gemini 3.5 FlashGLM-5.3
ProviderGoogleZ.ai (Zhipu)
Noometry Index54.254.8
Released2026-05-192026-08-14
WeightsProprietaryOpen
Context window1.05M1M
Max output66K131K
Input $ / M tokens$1.50$1.40
Output $ / M tokens$9$4.40
Results tracked5442

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Category by category

Coding GLM-5.3 leads

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

BenchmarkGemini 3.5 FlashGLM-5.3
DeepSWE37.4%69%
LMArena WebDev14991622
SciCode53.1%59%
WeirdML62.6%75.4%
LMArena Coding14921496
ALE-Bench911.021,317
SWE-bench Verified79.3%—
FrontierCode—40.1%
CursorBench—42.6%
FrontierSWE—30.2%

Agentic & Tool Use GLM-5.3 leads

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

BenchmarkGemini 3.5 FlashGLM-5.3
APEX-Agents27.5%56.6%
Vending-Bench 25,3968,164
GBAEval6.7%—
GDP.pdf14%—

Reasoning Gemini 3.5 Flash leads

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

BenchmarkGemini 3.5 FlashGLM-5.3
NYT Connections (extended)92.6%74.2%
CritPt13.1%19.1%
Chess Puzzles50%21%
LMArena Hard Prompts14881489
Mystery Game Puzzles32%33%
DTBench94.7%87.7%
LMCA47.1%55.5%
Epoch Capabilities Index154.46155.61
ARC-AGI-272.1%—
SimpleBench76.7%—
ARC-AGI-192.5%—
EnigmaEval25.4%—
EBR-Bench4.8%—
Surface Evolver Bench58.1%—
Bench to the Future 3—0.15
ForecastBench59—

Math GLM-5.3 leads

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

BenchmarkGemini 3.5 FlashGLM-5.3
FrontierMath (Tiers 1-3)62.8%68.8%
FrontierMath Tier 426.8%29.3%
OTIS Mock AIME 2024-202595.6%91.1%
ProofBench31%49%
LMArena Math15041489
MathArena Final-Answer Competitions76.3%—
FrontierMath (Feb 2025 set)39%—
FrontierMath Tier 4 (v1)14.6%—

Knowledge Gemini 3.5 Flash leads

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

BenchmarkGemini 3.5 FlashGLM-5.3
GPQA Diamond92.8%90.9%
SimpleQA Verified66.2%41%
LMArena Expert14951516

Multimodal Not comparable

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

BenchmarkGemini 3.5 FlashGLM-5.3
LMArena Vision1310—
Blueprint-Bench 233.6%—
LMArena Document1463—

Multilingual Gemini 3.5 Flash leads

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

BenchmarkGemini 3.5 FlashGLM-5.3
LMArena Non-English14761457
LMArena Chinese15261528
LMArena French14901499
LMArena German14921499
LMArena Japanese14861453
LMArena Korean14511472
LMArena Russian14931463
LMArena Spanish14801460

Instruction Following Too close to call

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

BenchmarkGemini 3.5 FlashGLM-5.3
LMArena Instruction Following14671477

Long Context Too close to call

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

BenchmarkGemini 3.5 FlashGLM-5.3
LMArena Longer Query14821482

Writing & Preference GLM-5.3 leads

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

BenchmarkGemini 3.5 FlashGLM-5.3
LMArena Text14821471
LMArena Creative Writing14701457
LMArena Multi-Turn14811472
EQ-Bench Creative Writing—2075
EQ-Bench 41087—

Frequently asked questions

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.

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