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Gemini 4 Carbon vs GLM 5.3 Flash

Gemini 4 Carbon leads GLM 5.3 Flash on coding, 86.6 to 56.2 on the Vibe Coding Index, and GLM 5.3 Flash costs 20.0x less per output token ($0.50 vs $10.00 per million). Updated November 14, 2026; 63 benchmarks have a result for both.

Replace Gemini 4 Carbon Replace GLM 5.3 Flash
Gemini 4 CarbonGoogle
Coding
86.6
Overall
88.3
Output $/M
$10.00
62
GLM 5.3 FlashZ.ai
Coding
56.2
Overall
61.8
Output $/M
$0.50
1
vs boards won of 63 shared

Gemini 4 Carbon or GLM 5.3 Flash: which to pick

Pick Gemini 4 Carbon for coding: it scores 86.6 on the Vibe Coding Index against 56.2 for GLM 5.3 Flash, though on 4 benchmarks against 6.

Pick GLM 5.3 Flash for output tokens 20.0x cheaper ($0.50 vs $10.00 per million) and work measured by Long context reasoning (AA-LCR), where it leads.

Model AGemini 4 CarbonGoogle86.6/1004 independent benchmarksNo cost per solved taskModel BGLM 5.3 FlashZ.ai56.2/1006 independent benchmarks$0.02 per solved task
Shared results
63
Gemini 4 Carbon only
10
GLM 5.3 Flash only
52
Like-for-like categories
8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

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 4 Carbon 86.6 from 4 benchmarks, GLM 5.3 Flash 56.2 from 6 benchmarks.
Widest category
Math, 31.7 points apart on average over 4 shared benchmarks.
Widest single gap
FrontierMath, tier 4: Gemini 4 Carbon 95.1% against GLM 5.3 Flash 17.1%, 78.0 points apart on a 0 to 100 scale.
Output price
Gemini 4 Carbon $10.00 against GLM 5.3 Flash $0.50 per million output tokens, 20.0x 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 4 CarbonBarsGLM 5.3 FlashTies
Coding130
Intelligence20
Agentic work70
Reasoning110
Math40
Knowledge50
Web design60
General141
All shared boards621
CodingLike-for-likeSix of these boards feed the Vibe Coding Index130
Coding benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 5.3 FlashLeader
LiveBench coding91.0%70.9%Gemini 4 Carbon
LMArena WebDev17681609Gemini 4 Carbon
AA Coding IndexNot measured71.5Only GLM 5.3 Flash measured
LiveCodeBench (Vals AI)Not measured80.5%Only GLM 5.3 Flash measured
SWE-bench Verified (Vals AI)Not measured92.0%Only GLM 5.3 Flash measured
Terminal-Bench 4 (Vals AI)63.1%37.4%Gemini 4 Carbon
Vibe Code Bench (Vals AI)89.1%30.8%Gemini 4 Carbon
Code migration (Vals AI)Not measured20.5%Only GLM 5.3 Flash measured
ProgramBench (Vals AI)Not measured0.0%Only GLM 5.3 Flash measured
IOI (Vals AI)Not measured52.5%Only GLM 5.3 Flash measured
Terminal-Bench 2.1 (Vals AI)Not measured62.9%Only GLM 5.3 Flash measured
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
Terminal-Bench 4.0 (Artificial Analysis run)65.2%32.8%Gemini 4 Carbon
FrontierCode 2.040.6%17.6%Gemini 4 Carbon
FrontierCodeNot measured31.8%Only GLM 5.3 Flash measured
FrontierSWE61.2%18.1%Gemini 4 Carbon
ALE-Bench2374.7303.6Gemini 4 Carbon
LMArena Text: coding15641509Gemini 4 Carbon
LMArena Text: software and IT15521501Gemini 4 Carbon
LMArena WebDev: React17921628Gemini 4 Carbon
LMArena WebDev: HTML17701576Gemini 4 Carbon
LMArena WebDev: from an imageNot measured1582Only GLM 5.3 Flash measured
GameBench 2Not measured60.8Only GLM 5.3 Flash measured
Terminal-Bench 4.0Not measured36.7%Only GLM 5.3 Flash measured
CursorBench 4.060.4%36.8%Gemini 4 Carbon
Neither model has a result on the other 24 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 5.3 FlashLeader
AA Intelligence Index60.027.8Gemini 4 Carbon
Epoch Capabilities Index169.8153.8Gemini 4 Carbon
Agentic workLike-for-likePublic boards, shown as published, kept out of the index70
Agentic work benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 5.3 FlashLeader
AA Agentic IndexNot measured50.9Only GLM 5.3 Flash measured
Design Arena: agents building mobile apps1284Not measuredOnly Gemini 4 Carbon measured
Design Arena: spreadsheets1224Not measuredOnly Gemini 4 Carbon measured
LiveBench research92.5%73.9%Gemini 4 Carbon
LiveBench browser80.0%59.8%Gemini 4 Carbon
LiveBench long agentic72.7%20.7%Gemini 4 Carbon
SREBench (Vals AI)Not measured0.8%Only GLM 5.3 Flash measured
Finance Agent (Vals AI)Not measured57.9%Only GLM 5.3 Flash measured
Tax Agent Bench (Vals AI)51.8%31.6%Gemini 4 Carbon
Legal Research Bench (Vals AI)55.8%45.2%Gemini 4 Carbon
Harvey's Legal Agent Benchmark (Vals AI)17.5%10.4%Gemini 4 Carbon
Excel Modeling Benchmark (Vals AI)Not measured55.9%Only GLM 5.3 Flash measured
Terminal-Bench-Science (Vals AI)Not measured2.9%Only GLM 5.3 Flash measured
APEX-Agents84.2%52.8%Gemini 4 Carbon
PostTrainBenchNot measured36.8%Only GLM 5.3 Flash measured
Vending-Bench 2$16,484Not measuredOnly Gemini 4 Carbon measured
Toolathlon-VerifiedNot measured78.4%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 index110
Reasoning benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 5.3 FlashLeader
GPQA DiamondNot measured86.4%Only GLM 5.3 Flash measured
LiveBench reasoning90.6%77.6%Gemini 4 Carbon
MMMU Pro (Vals AI)Not measured86.0%Only GLM 5.3 Flash measured
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
HLE-Diamond (Artificial Analysis run)69.1%18.2%Gemini 4 Carbon
CritPt v2, hard subset (Artificial Analysis run)69.0%24.5%Gemini 4 Carbon
GPQA Diamond (Epoch AI run)96.5%90.2%Gemini 4 Carbon
ARC-AGI98.5%91.0%Gemini 4 Carbon
ARC-AGI-294.2%65.8%Gemini 4 Carbon
SimpleBench92.6%Not measuredOnly Gemini 4 Carbon measured
Chess puzzles78.0%21.0%Gemini 4 Carbon
Mystery game puzzles73.0%8.0%Gemini 4 Carbon
EBR-bench87.6%Not measuredOnly Gemini 4 Carbon measured
LMArena Text: hard prompts15511490Gemini 4 Carbon
LMArena Text: expert15821511Gemini 4 Carbon
LMArena Text: hard prompts in English15451492Gemini 4 Carbon
LMArena Vision: diagramsNot measured1321Only GLM 5.3 Flash measured
LMArena Vision: homeworkNot measured1323Only GLM 5.3 Flash measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 5.3 FlashLeader
OTIS Mock AIME100.0%93.9%Gemini 4 Carbon
FrontierMath, tiers 1 to 390.5%55.8%Gemini 4 Carbon
FrontierMath, tier 495.1%17.1%Gemini 4 Carbon
ProofBenchNot measured21.0%Only GLM 5.3 Flash measured
LMArena Text: mathNot measured1503Only GLM 5.3 Flash measured
LMArena Text: mathematical work15381491Gemini 4 Carbon
MathArena85.4%Not measuredOnly Gemini 4 Carbon measured
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
Knowledge benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 5.3 FlashLeader
MMLU ProNot measured86.1%Only GLM 5.3 Flash measured
LegalBench (Vals AI)Not measured83.9%Only GLM 5.3 Flash measured
TaxEval (Vals AI)Not measured75.6%Only GLM 5.3 Flash measured
AA-Omniscience53.50.7Gemini 4 Carbon
SimpleQA Verified77.7%Not measuredOnly Gemini 4 Carbon measured
LMArena Text: science15351485Gemini 4 Carbon
LMArena Text: medicine and healthcare15251480Gemini 4 Carbon
LMArena Text: legal and government15421478Gemini 4 Carbon
LMArena Text: business and finance15201461Gemini 4 Carbon
FACTS Benchmark Suite78.4%Not measuredOnly Gemini 4 Carbon measured
PRBench Legal53.3%Not measuredOnly Gemini 4 Carbon measured
Neither model has a result on the other 10 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 5.3 FlashLeader
Design Arena: websites13191257Gemini 4 Carbon
Design Arena: UI components13571296Gemini 4 Carbon
Design Arena: game dev13261266Gemini 4 Carbon
Design Arena: data vizNot measured1258Only GLM 5.3 Flash measured
Design Arena: 3D14341292Gemini 4 Carbon
Design Arena: all code categories13481267Gemini 4 Carbon
Design Arena: SVGNot measured1271Only GLM 5.3 Flash measured
Design Arena: ASCII artNot measured1269Only GLM 5.3 Flash measured
LiveBench design80.2%73.7%Gemini 4 Carbon
GeneralLike-for-likePublic boards, shown as published, kept out of the index141
General benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 5.3 FlashLeader
Vals Index70.5%50.9%Gemini 4 Carbon
LiveBench data analysis86.5%76.4%Gemini 4 Carbon
SAGE (Vals AI)Not measured89.3%Only GLM 5.3 Flash measured
MedScribe (Vals AI)Not measured88.9%Only GLM 5.3 Flash measured
Long context reasoning (AA-LCR)79.3%80.0%GLM 5.3 Flash
GDPval-AA17331648Gemini 4 Carbon
Surface Evolver BenchNot measured52.5%Only GLM 5.3 Flash measured
Furniture assembly77.5%Not measuredOnly Gemini 4 Carbon measured
LMArena Text15381472Gemini 4 Carbon
LMArena Text: instruction following15391480Gemini 4 Carbon
LMArena Text: creative writing15331442Gemini 4 Carbon
LMArena VisionNot measured1295Only GLM 5.3 Flash measured
LMArena Text: English15301477Gemini 4 Carbon
LMArena Text: non-English15341462Gemini 4 Carbon
LMArena Text: Chinese16131528Gemini 4 Carbon
LMArena Text: GermanNot measured1452Only GLM 5.3 Flash measured
LMArena Text: JapaneseNot measured1453Only GLM 5.3 Flash measured
LMArena Text: KoreanNot measured1427Only GLM 5.3 Flash measured
LMArena Text: FrenchNot measured1489Only GLM 5.3 Flash measured
LMArena Text: SpanishNot measured1476Only GLM 5.3 Flash measured
LMArena Text: Russian15601467Gemini 4 Carbon
LMArena Text: PolishNot measured1448Only GLM 5.3 Flash measured
LMArena Text: multi-turn15691471Gemini 4 Carbon
LMArena Text: longer queries15491481Gemini 4 Carbon
LMArena Text: writing and language15421457Gemini 4 Carbon
LMArena Text: entertainment and media15271442Gemini 4 Carbon
LMArena Vision: EnglishNot measured1299Only GLM 5.3 Flash measured
LMArena Vision: ChineseNot measured1359Only GLM 5.3 Flash measured
LMArena Vision: reading textNot measured1303Only GLM 5.3 Flash measured
LMArena Vision: humorNot measured1291Only GLM 5.3 Flash measured
LMArena Vision: recognizing thingsNot measured1279Only GLM 5.3 Flash measured
LMArena Vision: creative writingNot measured1272Only GLM 5.3 Flash measured
Neither model has a result on the other 17 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Gemini 4 Carbon and GLM 5.3 Flash
BenchmarkGemini 4 CarbonGLM 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 4 Carbon$0.0070Fits 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 4 Carbon$0.130Fits 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 4 Carbon$0.500Fits 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 4 Carbon and GLM 5.3 Flash
SpecificationGoogle Gemini 4 CarbonZ.ai GLM 5.3 Flash
MakerGoogleZ.ai
WeightsNo public weights listedOpen weights
ReleasedNovember 10, 2026August 26, 2026
Context window1.05M1.05M
Input $/Mtok$2.00$0.15
Output $/Mtok$10.00$0.50
Coding index86.656.2
Independent measurements behind it46
Cost per solved taskNot computable$0.02
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 4 Carbon better than GLM 5.3 Flash for coding?

Pick Gemini 4 Carbon for coding: it scores 86.6 on the Vibe Coding Index against 56.2 for GLM 5.3 Flash, though on 4 benchmarks against 6. Pick GLM 5.3 Flash for output tokens 20.0x cheaper ($0.50 vs $10.00 per million) and work measured by Long context reasoning (AA-LCR), where it leads.

Which is cheaper, Gemini 4 Carbon or GLM 5.3 Flash?

Gemini 4 Carbon costs $2.00 per million input tokens and $10.00 per million output tokens; GLM 5.3 Flash costs $0.15 and $0.50. Cost per solved task is known for GLM 5.3 Flash only.

Which has the bigger context window, Gemini 4 Carbon or GLM 5.3 Flash?

Neither: both take 1.05M tokens.

How many benchmarks is the Gemini 4 Carbon vs GLM 5.3 Flash comparison based on?

63 benchmarks have a result for both models as of November 14, 2026. Gemini 4 Carbon's coding index rests on 4 independent benchmarks and GLM 5.3 Flash's on 6. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gemini-4-carbon-vs-glm-5-3-flash">LLMBenchmark.ai, Gemini 4 Carbon vs GLM 5.3 Flash</a></p>