Enter opens the highlighted result. Esc closes.

Gemini 3.6 Flash vs GLM 5.1

Gemini 3.6 Flash leads GLM 5.1 on coding, 62.5 to 49.2 on the Vibe Coding Index, at about the same output price ($3.75 vs $4.40 per million). Updated October 21, 2026; 79 benchmarks have a result for both.

Replace Gemini 3.6 Flash Replace GLM 5.1
Gemini 3.6 FlashGoogle
Coding
62.5
Overall
68.3
Output $/M
$3.75
66
GLM 5.1Z.ai
Coding
49.2
Overall
57.5
Output $/M
$4.40
12
vs boards won of 79 shared, 1 tied

Gemini 3.6 Flash or GLM 5.1: which to pick

Pick Gemini 3.6 Flash for coding: it scores 62.5 on the Vibe Coding Index against 49.2 for GLM 5.1.

Pick GLM 5.1 for a lower cost per solved task ($0.60 against $1.49) and work measured by WeirdML or ALE-Bench, where it leads.

Model AGemini 3.6 FlashGoogle62.5/1004 independent benchmarks$1.49 per solved taskModel BGLM 5.1Z.ai49.2/1003 independent benchmarks$0.60 per solved task
Shared results
79
Gemini 3.6 Flash only
30
GLM 5.1 only
10
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 3.6 Flash 62.5 from 4 benchmarks, GLM 5.1 49.2 from 3 benchmarks.
Widest category
Math, 9.2 points apart on average over 5 shared benchmarks.
Widest single gap
Design Arena: spreadsheets: Gemini 3.6 Flash 1034 against GLM 5.1 1315, 35.1 points apart on a 0 to 100 scale.
Output price
Gemini 3.6 Flash $3.75 against GLM 5.1 $4.40 per million output tokens, 1.2x apart.
Context window
Gemini 3.6 Flash takes 1.05M tokens, GLM 5.1 205K.

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 3.6 FlashBarsGLM 5.1Ties
Coding1221 tie
Intelligence20
Agentic work84
Reasoning80
Math50
Knowledge82
Web design43
General191
All shared boards66121 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index122
Coding benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
LMArena WebDev15381508Gemini 3.6 Flash
AA Coding Index69.255.8Gemini 3.6 Flash
LiveCodeBench (Vals AI)88.1%81.4%Gemini 3.6 Flash
SWE-bench Verified (Vals AI)79.6%76.4%Gemini 3.6 Flash
Vibe Code Bench (Vals AI)64.0%31.5%Gemini 3.6 Flash
Code migration (Vals AI)30.9%25.8%Gemini 3.6 Flash
ProgramBench (Vals AI)0.0%0.0%Tie
IOI (Vals AI)35.1%Not measuredOnly Gemini 3.6 Flash measured
Terminal-Bench 2.1 (Vals AI)73.8%56.9%Gemini 3.6 Flash
CyberBench (Vals AI)45.4%Not measuredOnly Gemini 3.6 Flash measured
SciCode53.4%44.8%Gemini 3.6 Flash
Terminal-Bench Hard (Artificial Analysis run)Not measured43.2%Only GLM 5.1 measured
FrontierCode34.4%Not measuredOnly Gemini 3.6 Flash measured
WeirdML56.1%57.1%GLM 5.1
ALE-Bench715.5887.1GLM 5.1
LMArena Text: coding14911485Gemini 3.6 Flash
LMArena Text: software and IT14921484Gemini 3.6 Flash
LMArena WebDev: React15281505Gemini 3.6 Flash
LMArena WebDev: HTML15471508Gemini 3.6 Flash
LMArena WebDev: from an image1545Not measuredOnly Gemini 3.6 Flash measured
SciCode10.8%Not measuredOnly Gemini 3.6 Flash measured
Neither model has a result on the other 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
AA Intelligence Index34.026.1Gemini 3.6 Flash
Epoch Capabilities Index154.5149.8Gemini 3.6 Flash
Agentic workLike-for-likePublic boards, shown as published, kept out of the index84
Agentic work benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
AA Agentic Index29.023.9Gemini 3.6 Flash
Design Arena: agents building web apps11971175Gemini 3.6 Flash
Design Arena: agents building full-stack apps11811167Gemini 3.6 Flash
Design Arena: agents building mobile apps11991162Gemini 3.6 Flash
Design Arena: agents building Android apps12031180Gemini 3.6 Flash
Design Arena: agents building Godot gamesNot measured1053Only GLM 5.1 measured
Design Arena: agents building games11811164Gemini 3.6 Flash
Design Arena: HTML slides11481170GLM 5.1
Design Arena: PowerPoint slides11461188GLM 5.1
Design Arena: spreadsheets10341315GLM 5.1
Finance Agent (Vals AI)56.3%44.8%Gemini 3.6 Flash
Tax Agent Bench (Vals AI)18.0%Not measuredOnly Gemini 3.6 Flash measured
Legal Research Bench (Vals AI)25.0%27.9%GLM 5.1
Excel Modeling Benchmark (Vals AI)65.4%Not measuredOnly Gemini 3.6 Flash measured
BioMysteryBench (Vals AI)58.5%Not measuredOnly Gemini 3.6 Flash measured
Terminal-Bench-Science (Vals AI)4.3%Not measuredOnly Gemini 3.6 Flash measured
τ²-Bench TelecomNot measured97.7%Only GLM 5.1 measured
APEX-Agents46.9%40.9%Gemini 3.6 Flash
Vending-Bench 2Not measured$5,634Only GLM 5.1 measured
Neither model has a result on the other 22 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index80
Reasoning benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
GPQA Diamond93.4%84.5%Gemini 3.6 Flash
MMMU Pro (Vals AI)88.4%Not measuredOnly Gemini 3.6 Flash measured
GPQA Diamond (Artificial Analysis run)92.8%86.8%Gemini 3.6 Flash
Humanity's Last Exam (Artificial Analysis run)40.8%30.1%Gemini 3.6 Flash
GPQA Diamond (Epoch AI run)94.1%89.9%Gemini 3.6 Flash
ARC-AGI91.2%Not measuredOnly Gemini 3.6 Flash measured
ARC-AGI-260.4%Not measuredOnly Gemini 3.6 Flash measured
SimpleBenchNot measured55.1%Only GLM 5.1 measured
Chess puzzles42.0%20.0%Gemini 3.6 Flash
Mystery game puzzles30.0%Not measuredOnly Gemini 3.6 Flash measured
LMArena Text: hard prompts14861473Gemini 3.6 Flash
LMArena Text: expert14901478Gemini 3.6 Flash
LMArena Text: hard prompts in English14841482Gemini 3.6 Flash
LMArena Vision: diagrams1314Not measuredOnly Gemini 3.6 Flash measured
LMArena Vision: homework1314Not measuredOnly Gemini 3.6 Flash measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index50
Math benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
AIMENot measured91.9%Only GLM 5.1 measured
OTIS Mock AIME94.2%93.3%Gemini 3.6 Flash
FrontierMath, tiers 1 to 358.9%36.8%Gemini 3.6 Flash
FrontierMath, tier 422.0%Not measuredOnly Gemini 3.6 Flash measured
ProofBench36.0%22.2%Gemini 3.6 Flash
LMArena Text: math15081473Gemini 3.6 Flash
LMArena Text: mathematical work14921470Gemini 3.6 Flash
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index82
Knowledge benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
MMLU Pro89.3%86.9%Gemini 3.6 Flash
LegalBench (Vals AI)86.7%84.4%Gemini 3.6 Flash
CaseLaw (Vals AI)Not measured51.5%Only GLM 5.1 measured
CorpFin (Vals AI)63.3%64.5%GLM 5.1
TaxEval (Vals AI)74.9%71.2%Gemini 3.6 Flash
MortgageTax (Vals AI)67.6%Not measuredOnly Gemini 3.6 Flash measured
MedCode (Vals AI)53.1%41.6%Gemini 3.6 Flash
SimpleQA Verified66.2%34.0%Gemini 3.6 Flash
LMArena Text: science14891478Gemini 3.6 Flash
LMArena Text: medicine and healthcare14691474GLM 5.1
LMArena Text: legal and government14791465Gemini 3.6 Flash
LMArena Text: business and finance14641452Gemini 3.6 Flash
FACTS Benchmark Suite65.3%Not measuredOnly Gemini 3.6 Flash measured
Neither model has a result on the other 5 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index43
Web design benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
Design Arena: websites13001290Gemini 3.6 Flash
Design Arena: UI components12971292Gemini 3.6 Flash
Design Arena: game dev12631265GLM 5.1
Design Arena: data viz12891366GLM 5.1
Design Arena: 3D12721336GLM 5.1
Design Arena: all code categories12901268Gemini 3.6 Flash
Design Arena: SVGNot measured1218Only GLM 5.1 measured
Design Arena: ASCII art12811142Gemini 3.6 Flash
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index191
General benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
Public Benefits Bench (Vals AI)56.6%61.8%GLM 5.1
SAGE (Vals AI)48.7%Not measuredOnly Gemini 3.6 Flash measured
MedScribe (Vals AI)79.7%72.3%Gemini 3.6 Flash
Vals Multimodal Index65.1%Not measuredOnly Gemini 3.6 Flash measured
IFBenchNot measured76.3%Only GLM 5.1 measured
Long context reasoning (AA-LCR)80.0%73.7%Gemini 3.6 Flash
DTBench95.5%Not measuredOnly Gemini 3.6 Flash measured
LMCA44.9%Not measuredOnly Gemini 3.6 Flash measured
Furniture assembly23.3%Not measuredOnly Gemini 3.6 Flash measured
ExploitBenchNot measured18.1%Only GLM 5.1 measured
LMArena Text14801463Gemini 3.6 Flash
LMArena Text: instruction following14671453Gemini 3.6 Flash
LMArena Text: creative writing14661453Gemini 3.6 Flash
LMArena Vision1299Not measuredOnly Gemini 3.6 Flash measured
LMArena Text: English14821476Gemini 3.6 Flash
LMArena Text: non-English14701448Gemini 3.6 Flash
LMArena Text: Chinese15311515Gemini 3.6 Flash
LMArena Text: German14801467Gemini 3.6 Flash
LMArena Text: Japanese14751435Gemini 3.6 Flash
LMArena Text: Korean14291424Gemini 3.6 Flash
LMArena Text: French15031470Gemini 3.6 Flash
LMArena Text: Spanish14761468Gemini 3.6 Flash
LMArena Text: Russian14881454Gemini 3.6 Flash
LMArena Text: Polish14731449Gemini 3.6 Flash
LMArena Text: multi-turn14811473Gemini 3.6 Flash
LMArena Text: longer queries14751467Gemini 3.6 Flash
LMArena Text: writing and language14701454Gemini 3.6 Flash
LMArena Text: entertainment and media14561442Gemini 3.6 Flash
LMArena Vision: English1295Not measuredOnly Gemini 3.6 Flash measured
LMArena Vision: Chinese1357Not measuredOnly Gemini 3.6 Flash measured
LMArena Vision: reading text1312Not measuredOnly Gemini 3.6 Flash measured
LMArena Vision: humor1289Not measuredOnly Gemini 3.6 Flash measured
LMArena Vision: creative writing1278Not measuredOnly Gemini 3.6 Flash measured
LMArena Document1456Not measuredOnly Gemini 3.6 Flash measured
Neither model has a result on the other 12 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Gemini 3.6 Flash and GLM 5.1
BenchmarkGemini 3.6 FlashGLM 5.1Leader
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 3.6 Flash$0.0026Fits in one request
GLM 5.1$0.0036Fits in one request

Gemini 3.6 Flash costs less

Repository review

50K input + 3K output tokens

Gemini 3.6 Flash$0.049Fits in one request
GLM 5.1$0.083Fits in one request

Gemini 3.6 Flash costs less

Agent loop

200K input + 10K output tokens

Gemini 3.6 Flash$0.188Fits in one request
GLM 5.1$0.324Exceeds the context window

Gemini 3.6 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 3.6 Flash and GLM 5.1
SpecificationGoogle Gemini 3.6 FlashZ.ai GLM 5.1
MakerGoogleZ.ai
WeightsNo public weights listedOpen weights
ReleasedJuly 21, 2026April 7, 2026
Context window1.05M205K
Input $/Mtok$0.75$1.40
Output $/Mtok$3.75$4.40
Coding index62.549.2
Independent measurements behind it43
Cost per solved task$1.49$0.60
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 3.6 Flash better than GLM 5.1 for coding?

Pick Gemini 3.6 Flash for coding: it scores 62.5 on the Vibe Coding Index against 49.2 for GLM 5.1. Pick GLM 5.1 for a lower cost per solved task ($0.60 against $1.49) and work measured by WeirdML or ALE-Bench, where it leads.

Which is cheaper, Gemini 3.6 Flash or GLM 5.1?

Gemini 3.6 Flash costs $0.75 per million input tokens and $3.75 per million output tokens; GLM 5.1 costs $1.40 and $4.40. Per solved SWE-bench Verified task, Gemini 3.6 Flash costs $1.49 and GLM 5.1 $0.60.

Which has the bigger context window, Gemini 3.6 Flash or GLM 5.1?

Gemini 3.6 Flash, with 1.05M tokens against 205K.

How many benchmarks is the Gemini 3.6 Flash vs GLM 5.1 comparison based on?

79 benchmarks have a result for both models as of October 21, 2026. Gemini 3.6 Flash's coding index rests on 4 independent benchmarks and GLM 5.1's on 3. Where only one model has a result, the page says so instead of naming a winner.

Compare next

Embed this comparison on your site

Free under CC BY 4.0, while the source link stays visible. Preview the frame · Terms and other embeds

<iframe src="https://llmbenchmark.ai/embed/compare/gemini-3-6-flash-vs-glm-5-1" title="Gemini 3.6 Flash vs GLM 5.1, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gemini-3-6-flash-vs-glm-5-1">LLMBenchmark.ai, Gemini 3.6 Flash vs GLM 5.1</a></p>