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GLM 5V Turbo vs GPT-5.1

GPT-5.1 leads GLM 5V Turbo on the Artificial Analysis Intelligence Index, 24.7 to 23.5, and GLM 5V Turbo costs 2.5x less per output token ($4.00 vs $10.00 per million). Updated October 22, 2026; 57 benchmarks have a result for both.

Replace GLM 5V Turbo Replace GPT-5.1
GLM 5V TurboZ.ai
Coding
No data
Overall
No data
Output $/M
$4.00
25
GPT-5.1OpenAI
Coding
40.4
Overall
55.0
Output $/M
$10.00
32
vs boards won of 57 shared

GLM 5V Turbo or GPT-5.1: which to pick

Only GPT-5.1 has a coding score, 40.4 on the Vibe Coding Index; GLM 5V Turbo has none, so the two cannot be ranked on coding.

Pick GLM 5V Turbo for output tokens 2.5x cheaper ($4.00 vs $10.00 per million) and work measured by LMArena WebDev or LMArena Text: coding, where it leads.

Model AGLM 5V TurboZ.aiNot benchmarked1 independent benchmarkNo cost per solved taskModel BGPT-5.1OpenAI40.4/1003 independent benchmarks$1.02 per solved task
Shared results
57
GLM 5V Turbo only
8
GPT-5.1 only
44
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
GLM 5V Turbo not benchmarked, GPT-5.1 40.4 from 3 benchmarks.
Widest category
Agentic work, 16.7 points apart on average over 1 shared benchmark.
Widest single gap
Design Arena: 3D: GLM 5V Turbo 1208 against GPT-5.1 1060, 18.5 points apart on a 0 to 100 scale.
Output price
GLM 5V Turbo $4.00 against GPT-5.1 $10.00 per million output tokens, 2.5x apart.
Context window
GLM 5V Turbo takes 203K tokens, GPT-5.1 400K.

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
CategoryGLM 5V TurboBarsGPT-5.1Ties
Coding52
Intelligence01
Agentic work10
Reasoning25
Math02
Knowledge13
Web design62
General1017
All shared boards2532
CodingLike-for-likeSix of these boards feed the Vibe Coding Index52
Coding benchmarks for GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-5.1Leader
SWE-bench VerifiedNot measured66.0%Only GPT-5.1 measured
LMArena WebDev14021396GLM 5V Turbo
AA Coding IndexNot measured49.4Only GPT-5.1 measured
LiveCodeBench (Vals AI)Not measured86.5%Only GPT-5.1 measured
SWE-bench Verified (Vals AI)Not measured69.8%Only GPT-5.1 measured
Vibe Code Bench (Vals AI)Not measured24.6%Only GPT-5.1 measured
LiveCodeBench (Artificial Analysis run)Not measured86.8%Only GPT-5.1 measured
Terminal-Bench Hard (Artificial Analysis run)32.6%45.5%GPT-5.1
Terminal-BenchNot measured47.6%Only GPT-5.1 measured
GSO-BenchNot measured13.7%Only GPT-5.1 measured
WeirdMLNot measured60.8%Only GPT-5.1 measured
LMArena Text: coding14661453GLM 5V Turbo
LMArena Text: software and IT14601454GLM 5V Turbo
LMArena WebDev: React13861307GLM 5V Turbo
LMArena WebDev: HTML13561405GPT-5.1
LMArena WebDev: from an image14251421GLM 5V Turbo
Neither model has a result on the other 23 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-5.1Leader
AA Intelligence Index23.524.7GPT-5.1
Epoch Capabilities IndexNot measured149.8Only GPT-5.1 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-5.1Leader
Design Arena: agents building web apps1124Not measuredOnly GLM 5V Turbo measured
Design Arena: agents building full-stack apps1149Not measuredOnly GLM 5V Turbo measured
Design Arena: agents building mobile apps1134Not measuredOnly GLM 5V Turbo measured
Design Arena: agents building Android apps1267Not measuredOnly GLM 5V Turbo measured
Design Arena: agents building Godot games957Not measuredOnly GLM 5V Turbo measured
Design Arena: agents building games1102Not measuredOnly GLM 5V Turbo measured
Design Arena: HTML slides1070Not measuredOnly GLM 5V Turbo measured
Design Arena: PowerPoint slides1128Not measuredOnly GLM 5V Turbo measured
τ²-Bench Telecom98.5%81.9%GLM 5V Turbo
DeepResearch BenchNot measured42.8%Only GPT-5.1 measured
Vending-Bench 2Not measured$1,473Only GPT-5.1 measured
Neither model has a result on the other 30 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index25
Reasoning benchmarks for GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-5.1Leader
GPQA DiamondNot measured86.6%Only GPT-5.1 measured
MMMU Pro (Vals AI)Not measured83.2%Only GPT-5.1 measured
GPQA Diamond (Artificial Analysis run)80.9%87.3%GPT-5.1
Humanity's Last Exam (Artificial Analysis run)17.1%28.5%GPT-5.1
GPQA Diamond (Epoch AI run)Not measured87.6%Only GPT-5.1 measured
ARC-AGINot measured72.8%Only GPT-5.1 measured
ARC-AGI-2Not measured17.6%Only GPT-5.1 measured
SimpleBenchNot measured53.2%Only GPT-5.1 measured
Chess puzzlesNot measured42.0%Only GPT-5.1 measured
Mystery game puzzlesNot measured19.0%Only GPT-5.1 measured
VPCTNot measured58.7%Only GPT-5.1 measured
LMArena Text: hard prompts14431457GPT-5.1
LMArena Text: expert14531470GPT-5.1
LMArena Text: hard prompts in English14561462GPT-5.1
LMArena Vision: diagrams12861264GLM 5V Turbo
LMArena Vision: homework12731272GLM 5V Turbo
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 GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-5.1Leader
AIMENot measured93.3%Only GPT-5.1 measured
MGSM (Vals AI)Not measured93.0%Only GPT-5.1 measured
AA Math IndexNot measured94.0Only GPT-5.1 measured
AIME 2025 (Artificial Analysis run)Not measured94.0%Only GPT-5.1 measured
OTIS Mock AIMENot measured88.6%Only GPT-5.1 measured
LMArena Text: math14421446GPT-5.1
LMArena Text: mathematical work14471449GPT-5.1
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index13
Knowledge benchmarks for GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-5.1Leader
MMLU ProNot measured86.4%Only GPT-5.1 measured
LegalBench (Vals AI)Not measured85.7%Only GPT-5.1 measured
CaseLaw (Vals AI)Not measured73.4%Only GPT-5.1 measured
CorpFin (Vals AI)Not measured63.8%Only GPT-5.1 measured
TaxEval (Vals AI)Not measured74.9%Only GPT-5.1 measured
MortgageTax (Vals AI)Not measured61.4%Only GPT-5.1 measured
MedQA (Vals AI)Not measured96.4%Only GPT-5.1 measured
MedCode (Vals AI)Not measured52.7%Only GPT-5.1 measured
MMLU Pro (Artificial Analysis run)Not measured87.0%Only GPT-5.1 measured
SimpleQA VerifiedNot measured48.0%Only GPT-5.1 measured
LMArena Text: science14481459GPT-5.1
LMArena Text: medicine and healthcare14331456GPT-5.1
LMArena Text: legal and government14361459GPT-5.1
LMArena Text: business and finance14351431GLM 5V Turbo
FACTS Benchmark SuiteNot measured45.0%Only GPT-5.1 measured
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index62
Web design benchmarks for GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-5.1Leader
Design Arena: websites12301187GLM 5V Turbo
Design Arena: UI components12101164GLM 5V Turbo
Design Arena: game dev12181178GLM 5V Turbo
Design Arena: data viz12021205GPT-5.1
Design Arena: 3D12081060GLM 5V Turbo
Design Arena: all code categories12271170GLM 5V Turbo
Design Arena: SVG11501148GLM 5V Turbo
Design Arena: ASCII art11171118GPT-5.1
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index1017
General benchmarks for GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-5.1Leader
SAGE (Vals AI)Not measured43.2%Only GPT-5.1 measured
MedScribe (Vals AI)Not measured88.1%Only GPT-5.1 measured
IFBench61.1%72.9%GPT-5.1
Long context reasoning (AA-LCR)70.3%80.0%GPT-5.1
DTBenchNot measured90.1%Only GPT-5.1 measured
LMCANot measured43.9%Only GPT-5.1 measured
CL-benchNot measured23.7%Only GPT-5.1 measured
CL-bench LifeNot measured17.3%Only GPT-5.1 measured
LMArena Text14371443GPT-5.1
LMArena Text: instruction following14231443GPT-5.1
LMArena Text: creative writing14171427GPT-5.1
LMArena Vision12641250GLM 5V Turbo
LMArena Text: English14541451GLM 5V Turbo
LMArena Text: non-English14201431GPT-5.1
LMArena Text: Chinese14911495GPT-5.1
LMArena Text: German14221438GPT-5.1
LMArena Text: JapaneseNot measured1453Only GPT-5.1 measured
LMArena Text: Korean13971401GPT-5.1
LMArena Text: French14431450GPT-5.1
LMArena Text: Spanish14521433GLM 5V Turbo
LMArena Text: Russian14321435GPT-5.1
LMArena Text: Polish14321440GPT-5.1
LMArena Text: multi-turn14311450GPT-5.1
LMArena Text: longer queries14381448GPT-5.1
LMArena Text: writing and language14201428GPT-5.1
LMArena Text: entertainment and media14071415GPT-5.1
LMArena Vision: English12741252GLM 5V Turbo
LMArena Vision: Chinese13291270GLM 5V Turbo
LMArena Vision: reading text12701255GLM 5V Turbo
LMArena Vision: humor12681263GLM 5V Turbo
LMArena Vision: captioning12641252GLM 5V Turbo
LMArena Vision: recognizing things12411232GLM 5V Turbo
LMArena Vision: creative writing12521266GPT-5.1
LMArena Document14161403GLM 5V Turbo
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 GLM 5V Turbo and GPT-5.1
BenchmarkGLM 5V TurboGPT-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

GLM 5V Turbo$0.0032Fits in one request
GPT-5.1$0.0063Fits in one request

GLM 5V Turbo costs less

Repository review

50K input + 3K output tokens

GLM 5V Turbo$0.072Fits in one request
GPT-5.1$0.092Fits in one request

GLM 5V Turbo costs less

Agent loop

200K input + 10K output tokens

GLM 5V Turbo$0.280Exceeds the context window
GPT-5.1$0.350Fits in one request

GLM 5V Turbo 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 GLM 5V Turbo and GPT-5.1
SpecificationZ.ai GLM 5V TurboOpenAI GPT-5.1
MakerZ.aiOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedApril 1, 2026November 13, 2025
Context window203K400K
Input $/Mtok$1.20$1.25
Output $/Mtok$4.00$10.00
Coding indexNot benchmarked40.4
Independent measurements behind it13
Cost per solved taskNot computable$1.02
SourceOpenRouter listingOpenRouter listing

Questions

Is GLM 5V Turbo better than GPT-5.1 for coding?

Only GPT-5.1 has a coding score, 40.4 on the Vibe Coding Index; GLM 5V Turbo has none, so the two cannot be ranked on coding. Pick GLM 5V Turbo for output tokens 2.5x cheaper ($4.00 vs $10.00 per million) and work measured by LMArena WebDev or LMArena Text: coding, where it leads.

Which is cheaper, GLM 5V Turbo or GPT-5.1?

GLM 5V Turbo costs $1.20 per million input tokens and $4.00 per million output tokens; GPT-5.1 costs $1.25 and $10.00. Cost per solved task is known for GPT-5.1 only.

Which has the bigger context window, GLM 5V Turbo or GPT-5.1?

GPT-5.1, with 400K tokens against 203K.

How many benchmarks is the GLM 5V Turbo vs GPT-5.1 comparison based on?

57 benchmarks have a result for both models as of October 22, 2026. GLM 5V Turbo's coding index rests on 1 independent benchmark and GPT-5.1's on 3. Where only one model has a result, the page says so instead of naming a winner.

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