Noometry

Model comparison

Gemini 3.8 Flash vs GLM-5.2

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 51.1 on the Noometry Index.

Last verified . 42 shared benchmarks.

Gemini 3.8 Flash Google

61.8

Rank #11 Confirmed

GLM-5.2 Z.ai (Zhipu)

51.1

Rank #44 Confirmed

Summary

  • They share 42 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 9 categories and GLM-5.2 in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3.8 Flash leads 76.9 to 42.3.
  • The biggest single-benchmark swing is ARC-AGI-2: 89.2% for Gemini 3.8 Flash and 22.8% for GLM-5.2.
  • Gemini 3.8 Flash is cheaper at $0.75 / $3.75 per million input/output tokens, against $1.40 / $4.40 for GLM-5.2.
  • Gemini 3.8 Flash accepts more context: 1.05M tokens versus 1M.
  • GLM-5.2 has downloadable open weights; the other is API-only.

Side by side

Gemini 3.8 FlashGLM-5.2
ProviderGoogleZ.ai (Zhipu)
Noometry Index61.851.1
Released2026-09-022026-06-13
WeightsProprietaryOpen
Context window1.05M1M
Max output66K131K
Input $ / M tokens$0.75$1.40
Output $ / M tokens$3.75$4.40
Results tracked5051

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Gemini 3.8 Flash leads

Gemini 3.8 Flash: 59.2 (#15), GLM-5.2: 51.3 (#41)

BenchmarkGemini 3.8 FlashGLM-5.2
DeepSWE73.8%43.8%
FrontierCode41.2%24.5%
LMArena WebDev15841603
SciCode56.6%50.5%
WeirdML84.8%70.1%
LMArena Coding15101485
ALE-Bench1,2701,047
SWE-bench Verified—78.7%
CursorBench39.6%—
FrontierSWE19.6%—

Agentic & Tool Use Gemini 3.8 Flash leads

Gemini 3.8 Flash: 41.8 (#21), GLM-5.2: 32.4 (#63)

BenchmarkGemini 3.8 FlashGLM-5.2
APEX-Agents64.3%45.2%
Vending-Bench 25,0948,314
Remote Labor Index5.8%—
τ²-bench Banking—37.1%
PostTrainBench—31.7%
GBAEval—0%
GDP.pdf23.4%—

Reasoning Gemini 3.8 Flash leads

Gemini 3.8 Flash: 76.9 (#5), GLM-5.2: 42.3 (#52)

BenchmarkGemini 3.8 FlashGLM-5.2
ARC-AGI-289.2%22.8%
NYT Connections (extended)97.4%74.3%
ARC-AGI-198.5%77%
CritPt18.3%20.9%
Chess Puzzles61%21%
LMArena Hard Prompts15081480
Mystery Game Puzzles47%19%
DTBench95.7%93.6%
LMCA52.9%45.8%
Surface Evolver Bench76.9%55.6%
Epoch Capabilities Index156.71151.78
SimpleBench—58.8%
Kagi LLM Benchmark—62.6%
EBR-Bench—9.5%

Math Gemini 3.8 Flash leads

Gemini 3.8 Flash: 65.3 (#28), GLM-5.2: 55.7 (#43)

BenchmarkGemini 3.8 FlashGLM-5.2
FrontierMath (Tiers 1-3)68.4%59.2%
FrontierMath Tier 422%29.3%
OTIS Mock AIME 2024-202598.9%86.4%
ProofBench48%35%
LMArena Math15281482
MathArena Final-Answer Competitions—67.6%

Knowledge Gemini 3.8 Flash leads

Gemini 3.8 Flash: 74.8 (#2), GLM-5.2: 57.1 (#40)

BenchmarkGemini 3.8 FlashGLM-5.2
GPQA Diamond95.4%91.9%
SimpleQA Verified69.7%34.2%
LMArena Expert15241486
Humanity's Last Exam44.5%—

Multimodal Not comparable

Gemini 3.8 Flash: 40.7 (#45), GLM-5.2: —

BenchmarkGemini 3.8 FlashGLM-5.2
LMArena Vision1314—
Blueprint-Bench 238.6%—
Furniture Assembly31.7%—

Multilingual Gemini 3.8 Flash leads

Gemini 3.8 Flash: 58.0 (#5), GLM-5.2: 55.8 (#26)

BenchmarkGemini 3.8 FlashGLM-5.2
LMArena Non-English14911459
LMArena Chinese15541519
LMArena French14981479
LMArena German14931468
LMArena Japanese15021451
LMArena Korean14591445
LMArena Russian15151466
LMArena Spanish14851477

Instruction Following Gemini 3.8 Flash leads

Gemini 3.8 Flash: 78.0 (#13), GLM-5.2: 76.9 (#34)

BenchmarkGemini 3.8 FlashGLM-5.2
LMArena Instruction Following14901465

Long Context Too close to call

Gemini 3.8 Flash: 46.3 (#24), GLM-5.2: 45.3 (#43)

BenchmarkGemini 3.8 FlashGLM-5.2
LMArena Longer Query15081479

Writing & Preference Gemini 3.8 Flash leads

Gemini 3.8 Flash: 72.2 (#15), GLM-5.2: 70.4 (#21)

BenchmarkGemini 3.8 FlashGLM-5.2
LMArena Text14991470
LMArena Creative Writing14921462
EQ-Bench Creative Writing17481757
LMArena Multi-Turn15011469
EQ-Bench 4—1222

Frequently asked questions

Is Gemini 3.8 Flash better than GLM-5.2?

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 51.1 on the Noometry Index.

Which is cheaper, Gemini 3.8 Flash or GLM-5.2?

Gemini 3.8 Flash is cheaper. It lists at $0.75 per million input tokens and $3.75 per million output tokens; GLM-5.2 lists at $1.40 and $4.40.

Is Gemini 3.8 Flash or GLM-5.2 better for coding?

Gemini 3.8 Flash scores higher on coding benchmarks: 59.2 versus 51.3 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.8 Flash does, with 1.05M tokens against 1M.

How many benchmarks do Gemini 3.8 Flash and GLM-5.2 share?

42 benchmarks have published results for both models. Gemini 3.8 Flash has 50 scored results on Noometry and GLM-5.2 has 51.

Related comparisons

Go deeper