Noometry

Model comparison

Gemini 2.5 Flash-Lite vs GLM-5.1

GLM-5.1 is the stronger model overall, scoring 47.8 to 37.0 on the Noometry Index. Gemini 2.5 Flash-Lite costs 12× less per token, which makes it the better buy when GLM-5.1's lead doesn't matter for your workload.

Last verified . 20 shared benchmarks.

Gemini 2.5 Flash-Lite Google

37.0

Rank #211 Confirmed

GLM-5.1 Z.ai (Zhipu)

47.8

Rank #59 Confirmed

Summary

  • They share 20 benchmarks with published results for both. Gemini 2.5 Flash-Lite scores higher in 1 category and GLM-5.1 in 8 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where GLM-5.1 leads 54.9 to 32.5.
  • The biggest single-benchmark swing is WeirdML: 35.2% for Gemini 2.5 Flash-Lite and 57.1% for GLM-5.1.
  • Gemini 2.5 Flash-Lite is cheaper at $0.10 / $0.40 per million input/output tokens, against $1.40 / $4.40 for GLM-5.1.
  • Gemini 2.5 Flash-Lite accepts more context: 1.05M tokens versus 200K.
  • GLM-5.1 has downloadable open weights; the other is API-only.

Side by side

Gemini 2.5 Flash-LiteGLM-5.1
ProviderGoogleZ.ai (Zhipu)
Noometry Index37.047.8
Released2025-06-172026-04-07
WeightsProprietaryOpen
Context window1.05M200K
Max output66K131K
Input $ / M tokens$0.10$1.40
Output $ / M tokens$0.40$4.40
Results tracked3341

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Category by category

Coding GLM-5.1 leads

Gemini 2.5 Flash-Lite: 38.5 (#173), GLM-5.1: 48.7 (#55)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
WeirdML35.2%57.1%
LMArena Coding13731485
ALE-Bench325.9887.1
SWE-bench Verified—74.2%
LMArena WebDev—1508
SciCode—43.8%

Agentic & Tool Use Gemini 2.5 Flash-Lite leads

Gemini 2.5 Flash-Lite: 28.0 (#96), GLM-5.1: 24.9 (#113)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
APEX-Agents—40.9%
Berkeley Function Calling Leaderboard36.9%—
ExploitBench—18.1%
GBAEval—0%
Vending-Bench 2—5,634

Reasoning GLM-5.1 leads

Gemini 2.5 Flash-Lite: 22.2 (#205), GLM-5.1: 39.1 (#60)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
LMArena Hard Prompts13771472
Epoch Capabilities Index133.94149.84
SimpleBench—55.1%
Kagi LLM Benchmark40.5%—
NYT Connections (extended)—77.7%
CritPt—4.6%
Chess Puzzles—19%
Thematic Generalization—69.8%
DTBench62.8%—
LMCA18.1%—

Math GLM-5.1 leads

Gemini 2.5 Flash-Lite: 38.0 (#144), GLM-5.1: 49.7 (#60)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
LMArena Math13731473
FrontierMath (Tiers 1-3)—36.8%
MathArena Final-Answer Competitions—67.1%
OTIS Mock AIME 2024-2025—93.3%
ProofBench—22.2%
Omni-MATH48%—
FrontierMath (Feb 2025 set)—33.4%
FrontierMath Tier 4 (v1)—12.5%

Knowledge GLM-5.1 leads

Gemini 2.5 Flash-Lite: 32.5 (#210), GLM-5.1: 54.9 (#50)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
LMArena Expert13731476
GPQA Diamond—89.9%
SimpleQA Verified—34%
MMLU-Pro53.7%—
Vectara Hallucination Rate3.3%—
GPQA (HELM)30.9%—

Multimodal Not comparable

Gemini 2.5 Flash-Lite: 29.1 (#114), GLM-5.1: —

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
LMArena Vision1198—
VPCT30%—

Multilingual GLM-5.1 leads

Gemini 2.5 Flash-Lite: 49.3 (#134), GLM-5.1: 55.0 (#36)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
LMArena Non-English13691447
LMArena Chinese14041515
LMArena French13881474
LMArena German13891465
LMArena Japanese13591434
LMArena Korean13601418
LMArena Russian13731454
LMArena Spanish13961469

Instruction Following GLM-5.1 leads

Gemini 2.5 Flash-Lite: 70.0 (#168), GLM-5.1: 76.3 (#42)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
LMArena Instruction Following13671451
IFEval81%—

Long Context GLM-5.1 leads

Gemini 2.5 Flash-Lite: 33.3 (#262), GLM-5.1: 44.9 (#53)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
LMArena Longer Query13731466
Fiction.LiveBench47.2%—

Writing & Preference GLM-5.1 leads

Gemini 2.5 Flash-Lite: 56.8 (#135), GLM-5.1: 66.9 (#31)

BenchmarkGemini 2.5 Flash-LiteGLM-5.1
LMArena Text13791461
LMArena Creative Writing13671453
LMArena Multi-Turn13661472
EQ-Bench Creative Writing—1592
WildBench81.8%—

Frequently asked questions

Is Gemini 2.5 Flash-Lite better than GLM-5.1?

GLM-5.1 is the stronger model overall, scoring 47.8 to 37.0 on the Noometry Index. Gemini 2.5 Flash-Lite costs 12× less per token, which makes it the better buy when GLM-5.1's lead doesn't matter for your workload.

Which is cheaper, Gemini 2.5 Flash-Lite or GLM-5.1?

Gemini 2.5 Flash-Lite is cheaper. It lists at $0.10 per million input tokens and $0.40 per million output tokens; GLM-5.1 lists at $1.40 and $4.40.

Is Gemini 2.5 Flash-Lite or GLM-5.1 better for coding?

GLM-5.1 scores higher on coding benchmarks: 48.7 versus 38.5 in the Noometry coding category.

Which has the bigger context window?

Gemini 2.5 Flash-Lite does, with 1.05M tokens against 200K.

How many benchmarks do Gemini 2.5 Flash-Lite and GLM-5.1 share?

20 benchmarks have published results for both models. Gemini 2.5 Flash-Lite has 33 scored results on Noometry and GLM-5.1 has 41.

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