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Gemini 3.1 Flash Lite Preview vs GLM 5.3 Flash

Updated October 21, 2026. 68 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Gemini 3.1 Flash Lite Preview Replace GLM 5.3 Flash
Gemini 3.1 Flash Lite PreviewGoogle
Coding
8.1
Overall
15.6
Output $/M
$1.50
2
GLM 5.3 FlashZ.ai
Coding
71.0
Overall
41.8
Output $/M
$0.50
65
vs boards won of 68 shared, 1 tied

Decision reading

Pick GLM 5.3 Flash for coding: it scores 71.0 on the Vibe Coding Index against 8.1 for Gemini 3.1 Flash Lite Preview.

Pick Gemini 3.1 Flash Lite Preview when what matters is ALE-Bench or MMLU Pro, where it leads.

Model AGemini 3.1 Flash Lite PreviewGoogle8.1/1001 independent benchmark$0.18 per solved taskModel BGLM 5.3 FlashZ.ai71.0/1002 independent benchmarks$0.02 per solved task
Shared results
68
Gemini 3.1 Flash Lite Preview only
9
GLM 5.3 Flash only
34
Like-for-like categories
8 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Gemini 3.1 Flash Lite Preview 8.1 from 1 benchmark, GLM 5.3 Flash 71.0 from 2 benchmarks.
Widest category
Agentic work, 38.9 points apart on average over 5 shared benchmarks.
Widest single gap
LMArena WebDev: React: Gemini 3.1 Flash Lite Preview 1245 against GLM 5.3 Flash 1624, 59.2 points apart on a 0 to 100 scale.
Output price
Gemini 3.1 Flash Lite Preview $1.50 against GLM 5.3 Flash $0.50 per million output tokens, 3.0x apart.
Context window
Both take 1.05M tokens.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryGemini 3.1 Flash Lite PreviewBarsGLM 5.3 FlashTies
Coding1121 tie
Intelligence01
Agentic work05
Reasoning07
Math02
Knowledge16
Web design08
General024
All shared boards2651 tie
CodingLike-for-likeFour of these boards feed the Vibe Coding Index112
Coding benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
LiveBench codingNot measured80.6%Only GLM 5.3 Flash measured
LMArena WebDev12571607GLM 5.3 Flash
AA Coding Index34.771.5GLM 5.3 Flash
LiveCodeBench (Vals AI)80.1%80.5%GLM 5.3 Flash
SWE-bench Verified (Vals AI)62.8%92.0%GLM 5.3 Flash
Terminal-Bench 4 (Vals AI)Not measured37.4%Only GLM 5.3 Flash measured
Vibe Code Bench (Vals AI)0.0%30.8%GLM 5.3 Flash
Code migration (Vals AI)4.6%20.5%GLM 5.3 Flash
ProgramBench (Vals AI)0.0%0.0%Tie
IOI (Vals AI)Not measured52.5%Only GLM 5.3 Flash measured
Terminal-Bench 2.1 (Vals AI)34.1%62.9%GLM 5.3 Flash
Vibe Code Bench 1-100 (Vals AI)Not measured16.0%Only GLM 5.3 Flash measured
SkillsBench (Vals AI)Not measured40.2%Only GLM 5.3 Flash measured
CyberBench (Vals AI)Not measured67.9%Only GLM 5.3 Flash measured
SciCodeNot measured51.6%Only GLM 5.3 Flash measured
FrontierCodeNot measured31.8%Only GLM 5.3 Flash measured
FrontierSWENot measured18.1%Only GLM 5.3 Flash measured
ALE-Bench797.7303.6Gemini 3.1 Flash Lite Preview
LMArena Text: coding14001507GLM 5.3 Flash
LMArena Text: software and IT14131500GLM 5.3 Flash
LMArena WebDev: React12451624GLM 5.3 Flash
LMArena WebDev: HTML12761577GLM 5.3 Flash
LMArena WebDev: from an image13361578GLM 5.3 Flash
Neither model has a result on the other 15 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
AA Intelligence Index15.641.8GLM 5.3 Flash
Epoch Capabilities IndexNot measured153.1Only GLM 5.3 Flash measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index05
Agentic work benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
AA Agentic Index1.650.9GLM 5.3 Flash
LiveBench researchNot measured70.1%Only GLM 5.3 Flash measured
LiveBench browserNot measured84.0%Only GLM 5.3 Flash measured
LiveBench long agenticNot measured28.4%Only GLM 5.3 Flash measured
SREBench (Vals AI)Not measured0.8%Only GLM 5.3 Flash measured
Finance Agent (Vals AI)30.0%57.9%GLM 5.3 Flash
Tax Agent Bench (Vals AI)3.1%31.6%GLM 5.3 Flash
Legal Research Bench (Vals AI)3.4%45.2%GLM 5.3 Flash
Harvey's Legal Agent Benchmark (Vals AI)Not measured10.4%Only GLM 5.3 Flash measured
Excel Modeling Benchmark (Vals AI)8.6%55.9%GLM 5.3 Flash
Terminal-Bench-Science (Vals AI)Not measured2.9%Only GLM 5.3 Flash measured
APEX-AgentsNot measured52.8%Only GLM 5.3 Flash measured
Neither model has a result on the other 27 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index07
Reasoning benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
GPQA Diamond81.1%86.4%GLM 5.3 Flash
LiveBench reasoningNot measured77.6%Only GLM 5.3 Flash measured
MMMU Pro (Vals AI)82.5%86.0%GLM 5.3 Flash
GPQA Diamond (Artificial Analysis run)Not measured91.2%Only GLM 5.3 Flash measured
Humanity's Last Exam (Artificial Analysis run)Not measured39.9%Only GLM 5.3 Flash measured
GPQA Diamond (Epoch AI run)Not measured90.2%Only GLM 5.3 Flash measured
ARC-AGINot measured91.0%Only GLM 5.3 Flash measured
ARC-AGI-2Not measured65.8%Only GLM 5.3 Flash measured
Chess puzzlesNot measured21.0%Only GLM 5.3 Flash measured
Mystery game puzzlesNot measured8.0%Only GLM 5.3 Flash measured
LMArena Text: hard prompts14071490GLM 5.3 Flash
LMArena Text: expert13981511GLM 5.3 Flash
LMArena Text: hard prompts in English14031488GLM 5.3 Flash
LMArena Vision: diagrams12421317GLM 5.3 Flash
LMArena Vision: homework12711318GLM 5.3 Flash
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
AIME83.3%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
OTIS Mock AIMENot measured93.9%Only GLM 5.3 Flash measured
FrontierMath, tiers 1 to 3Not measured55.8%Only GLM 5.3 Flash measured
FrontierMath, tier 4Not measured17.1%Only GLM 5.3 Flash measured
ProofBenchNot measured21.0%Only GLM 5.3 Flash measured
LMArena Text: math14281503GLM 5.3 Flash
LMArena Text: mathematical work14171497GLM 5.3 Flash
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index16
Knowledge benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
MMLU Pro86.2%86.1%Gemini 3.1 Flash Lite Preview
LegalBench (Vals AI)83.8%83.9%GLM 5.3 Flash
CaseLaw (Vals AI)55.0%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
CorpFin (Vals AI)59.4%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
TaxEval (Vals AI)71.8%75.6%GLM 5.3 Flash
MortgageTax (Vals AI)68.0%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
MedCode (Vals AI)47.6%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
LMArena Text: science14251484GLM 5.3 Flash
LMArena Text: medicine and healthcare14281475GLM 5.3 Flash
LMArena Text: legal and government14181473GLM 5.3 Flash
LMArena Text: business and finance13891460GLM 5.3 Flash
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index08
Web design benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
Design Arena: websites10831272GLM 5.3 Flash
Design Arena: UI components10711316GLM 5.3 Flash
Design Arena: game dev10291279GLM 5.3 Flash
Design Arena: data viz10451262GLM 5.3 Flash
Design Arena: 3D10481316GLM 5.3 Flash
Design Arena: all code categories10721282GLM 5.3 Flash
Design Arena: SVG10521284GLM 5.3 Flash
Design Arena: ASCII art11661269GLM 5.3 Flash
LiveBench designNot measured77.2%Only GLM 5.3 Flash measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index024
General benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
Vals IndexNot measured50.9%Only GLM 5.3 Flash measured
LiveBench data analysisNot measured76.4%Only GLM 5.3 Flash measured
SAGE (Vals AI)49.5%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
MedScribe (Vals AI)63.9%88.9%GLM 5.3 Flash
Vals Multimodal Index41.4%Not measuredOnly Gemini 3.1 Flash Lite Preview measured
Long context reasoning (AA-LCR)Not measured80.0%Only GLM 5.3 Flash measured
Surface Evolver BenchNot measured52.5%Only GLM 5.3 Flash measured
LMArena Text14161471GLM 5.3 Flash
LMArena Text: instruction following13771478GLM 5.3 Flash
LMArena Text: creative writing14011441GLM 5.3 Flash
LMArena Vision12401294GLM 5.3 Flash
LMArena Text: English14141474GLM 5.3 Flash
LMArena Text: non-English14101462GLM 5.3 Flash
LMArena Text: Chinese14601531GLM 5.3 Flash
LMArena Text: German14301462GLM 5.3 Flash
LMArena Text: Japanese14131444GLM 5.3 Flash
LMArena Text: Korean13921436GLM 5.3 Flash
LMArena Text: French14241491GLM 5.3 Flash
LMArena Text: Spanish14211475GLM 5.3 Flash
LMArena Text: Russian14201465GLM 5.3 Flash
LMArena Text: Polish14431450GLM 5.3 Flash
LMArena Text: multi-turn14171469GLM 5.3 Flash
LMArena Text: longer queries13941481GLM 5.3 Flash
LMArena Text: writing and language14081455GLM 5.3 Flash
LMArena Text: entertainment and media13861440GLM 5.3 Flash
LMArena Vision: English12321295GLM 5.3 Flash
LMArena Vision: Chinese12781363GLM 5.3 Flash
LMArena Vision: reading text12461299GLM 5.3 Flash
LMArena Vision: humor12661279GLM 5.3 Flash
LMArena Vision: captioning1259Not measuredOnly Gemini 3.1 Flash Lite Preview measured
LMArena Vision: recognizing things1308Not measuredOnly Gemini 3.1 Flash Lite Preview measured
LMArena Vision: creative writing12481270GLM 5.3 Flash
Neither model has a result on the other 14 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
BenchmarkGemini 3.1 Flash Lite PreviewGLM 5.3 FlashLeader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Gemini 3.1 Flash Lite Preview$0.0010Fits in one request
GLM 5.3 Flash$0.0004Fits in one request

GLM 5.3 Flash costs less

Repository review

50K input + 3K output tokens

Gemini 3.1 Flash Lite Preview$0.017Fits in one request
GLM 5.3 Flash$0.0090Fits in one request

GLM 5.3 Flash costs less

Agent loop

200K input + 10K output tokens

Gemini 3.1 Flash Lite Preview$0.065Fits in one request
GLM 5.3 Flash$0.035Fits in one request

GLM 5.3 Flash costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Gemini 3.1 Flash Lite Preview and GLM 5.3 Flash
SpecificationGoogle Gemini 3.1 Flash Lite PreviewZ.ai GLM 5.3 Flash
MakerGoogleZ.ai
WeightsNo public weights listedOpen weights
ReleasedMarch 3, 2026August 26, 2026
Context window1.05M1.05M
Input $/Mtok$0.25$0.15
Output $/Mtok$1.50$0.50
Coding index8.171.0
Independent measurements behind it12
Cost per solved task$0.18$0.02
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 3.1 Flash Lite Preview better than GLM 5.3 Flash for coding?

Pick GLM 5.3 Flash for coding: it scores 71.0 on the Vibe Coding Index against 8.1 for Gemini 3.1 Flash Lite Preview. Pick Gemini 3.1 Flash Lite Preview when what matters is ALE-Bench or MMLU Pro, where it leads.

Which is cheaper, Gemini 3.1 Flash Lite Preview or GLM 5.3 Flash?

Gemini 3.1 Flash Lite Preview costs $0.25 per million input tokens and $1.50 per million output tokens; GLM 5.3 Flash costs $0.15 and $0.50. Per solved SWE-bench Verified task, Gemini 3.1 Flash Lite Preview costs $0.18 and GLM 5.3 Flash $0.02.

Which has the bigger context window, Gemini 3.1 Flash Lite Preview or GLM 5.3 Flash?

Neither: both take 1.05M tokens.

How many benchmarks is the Gemini 3.1 Flash Lite Preview vs GLM 5.3 Flash comparison based on?

68 benchmarks have a result for both models as of October 21, 2026. Gemini 3.1 Flash Lite Preview's coding index rests on 1 independent benchmark and GLM 5.3 Flash's on 2. Where only one model has a result, the page says so instead of naming a winner.

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