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GLM 4.5 Air vs GPT-4o (2024-08-06)

GLM 4.5 Air leads GPT-4o (2024-08-06) on the Artificial Analysis Intelligence Index, 11.1 to 7.7, and GLM 4.5 Air costs 9.1x less per output token ($1.10 vs $10.00 per million). Updated October 22, 2026; 35 benchmarks have a result for both.

Replace GLM 4.5 Air Replace GPT-4o (2024-08-06)
GLM 4.5 AirZ.ai
Coding
No data
Overall
No data
Output $/M
$1.10
35
GPT-4o (2024-08-06)OpenAI
Coding
No data
Overall
26.3
Output $/M
$10.00
0
vs boards won of 35 shared

GLM 4.5 Air or GPT-4o (2024-08-06): which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick GLM 4.5 Air for output tokens 9.1x cheaper ($1.10 vs $10.00 per million) and a larger context window (131K against 128K tokens).

Model AGLM 4.5 AirZ.aiNot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-4o (2024-08-06)OpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
35
GLM 4.5 Air only
14
GPT-4o (2024-08-06) only
23
Like-for-like categories
7 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 4.5 Air not benchmarked, GPT-4o (2024-08-06) not benchmarked.
Widest category
Coding, 22.1 points apart on average over 4 shared benchmarks.
Widest single gap
LiveCodeBench (Artificial Analysis run): GLM 4.5 Air 68.4% against GPT-4o (2024-08-06) 31.7%, 36.7 points apart on a 0 to 100 scale.
Output price
GLM 4.5 Air $1.10 against GPT-4o (2024-08-06) $10.00 per million output tokens, 9.1x apart.
Context window
GLM 4.5 Air takes 131K tokens, GPT-4o (2024-08-06) 128K.

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 4.5 AirBarsGPT-4o (2024-08-06)Ties
Coding40
Intelligence10
Agentic work10
Reasoning50
Math20
Knowledge40
General180
All shared boards350
CodingLike-for-likeSix of these boards feed the Vibe Coding Index40
Coding benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
Aider polyglotNot measured23.1%Only GPT-4o (2024-08-06) measured
SWE-bench LiteNot measured21.7%Only GPT-4o (2024-08-06) measured
LiveCodeBench (Artificial Analysis run)68.4%31.7%GLM 4.5 Air
Terminal-Bench Hard (Artificial Analysis run)20.5%8.3%GLM 4.5 Air
GSO-Bench2.9%Not measuredOnly GLM 4.5 Air measured
LMArena Text: coding13971283GLM 4.5 Air
LMArena Text: software and IT14011278GLM 4.5 Air
Neither model has a result on the other 36 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
AA Intelligence Index11.17.7GLM 4.5 Air
Neither model has a result on the other 1 board here
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
τ²-Bench Telecom46.5%28.9%GLM 4.5 Air
Neither model has a result on the other 41 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
MMMU Pro (Vals AI)Not measured64.0%Only GPT-4o (2024-08-06) measured
GPQA Diamond (Artificial Analysis run)73.3%52.1%GLM 4.5 Air
Humanity's Last Exam (Artificial Analysis run)7.0%2.3%GLM 4.5 Air
GPQA Diamond (Epoch AI run)Not measured49.2%Only GPT-4o (2024-08-06) measured
SimpleBenchNot measured17.8%Only GPT-4o (2024-08-06) measured
Chess puzzlesNot measured6.0%Only GPT-4o (2024-08-06) measured
LMArena Text: hard prompts13791264GLM 4.5 Air
LMArena Text: expert13701241GLM 4.5 Air
LMArena Text: hard prompts in English13881277GLM 4.5 Air
Kagi LLM Benchmark43.0%Not measuredOnly GLM 4.5 Air measured
Neither model has a result on the other 13 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
AIMENot measured14.0%Only GPT-4o (2024-08-06) measured
MATH 500 (Vals AI)Not measured75.2%Only GPT-4o (2024-08-06) measured
MGSM (Vals AI)Not measured90.7%Only GPT-4o (2024-08-06) measured
AA Math Index80.7Not measuredOnly GLM 4.5 Air measured
AIME 2025 (Artificial Analysis run)80.7%Not measuredOnly GLM 4.5 Air measured
OTIS Mock AIMENot measured6.4%Only GPT-4o (2024-08-06) measured
FrontierMath, tiers 1 to 3Not measured0.4%Only GPT-4o (2024-08-06) measured
MATH level 5Not measured53.3%Only GPT-4o (2024-08-06) measured
LMArena Text: math13961285GLM 4.5 Air
LMArena Text: mathematical work13961283GLM 4.5 Air
MathArena12.0%Not measuredOnly GLM 4.5 Air measured
Neither model has a result on the other 3 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
MMLU ProNot measured74.1%Only GPT-4o (2024-08-06) measured
LegalBench (Vals AI)Not measured80.1%Only GPT-4o (2024-08-06) measured
CorpFin (Vals AI)Not measured39.4%Only GPT-4o (2024-08-06) measured
TaxEval (Vals AI)Not measured71.1%Only GPT-4o (2024-08-06) measured
MortgageTax (Vals AI)Not measured61.0%Only GPT-4o (2024-08-06) measured
MedQA (Vals AI)Not measured88.2%Only GPT-4o (2024-08-06) measured
MMLU Pro (Artificial Analysis run)81.5%Not measuredOnly GLM 4.5 Air measured
SimpleQA VerifiedNot measured26.0%Only GPT-4o (2024-08-06) measured
MMLUNot measured84.3%Only GPT-4o (2024-08-06) measured
LMArena Text: science14071274GLM 4.5 Air
LMArena Text: medicine and healthcare14021252GLM 4.5 Air
LMArena Text: legal and government13821275GLM 4.5 Air
LMArena Text: business and finance13711232GLM 4.5 Air
Neither model has a result on the other 7 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
Web design benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
Design Arena: websites1146Not measuredOnly GLM 4.5 Air measured
Design Arena: UI components1121Not measuredOnly GLM 4.5 Air measured
Design Arena: game dev1093Not measuredOnly GLM 4.5 Air measured
Design Arena: data viz1186Not measuredOnly GLM 4.5 Air measured
Design Arena: 3D1122Not measuredOnly GLM 4.5 Air measured
Design Arena: all code categories1137Not measuredOnly GLM 4.5 Air measured
Design Arena: SVG1070Not measuredOnly GLM 4.5 Air measured
Neither model has a result on the other 2 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index180
General benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
IFBench37.6%36.0%GLM 4.5 Air
Long context reasoning (AA-LCR)46.7%41.0%GLM 4.5 Air
LMArena Text13841283GLM 4.5 Air
LMArena Text: instruction following13541267GLM 4.5 Air
LMArena Text: creative writing13431274GLM 4.5 Air
LMArena VisionNot measured1065Only GPT-4o (2024-08-06) measured
LMArena Text: English13971297GLM 4.5 Air
LMArena Text: non-English13661262GLM 4.5 Air
LMArena Text: Chinese14261254GLM 4.5 Air
LMArena Text: German13771257GLM 4.5 Air
LMArena Text: Japanese13481234GLM 4.5 Air
LMArena Text: Korean13081218GLM 4.5 Air
LMArena Text: French14001263GLM 4.5 Air
LMArena Text: Spanish13851269GLM 4.5 Air
LMArena Text: Russian13731272GLM 4.5 Air
LMArena Text: Polish1368Not measuredOnly GLM 4.5 Air measured
LMArena Text: multi-turn13711279GLM 4.5 Air
LMArena Text: longer queries13661283GLM 4.5 Air
LMArena Text: writing and language13541290GLM 4.5 Air
LMArena Text: entertainment and media13391267GLM 4.5 Air
LMArena Vision: EnglishNot measured1072Only GPT-4o (2024-08-06) measured
LMArena Vision: ChineseNot measured1009Only GPT-4o (2024-08-06) measured
Neither model has a result on the other 26 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GLM 4.5 Air and GPT-4o (2024-08-06)
BenchmarkGLM 4.5 AirGPT-4o (2024-08-06)Leader
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 4.5 Air$0.0008Fits in one request
GPT-4o (2024-08-06)$0.0075Fits in one request

GLM 4.5 Air costs less

Repository review

50K input + 3K output tokens

GLM 4.5 Air$0.013Fits in one request
GPT-4o (2024-08-06)$0.155Fits in one request

GLM 4.5 Air costs less

Agent loop

200K input + 10K output tokens

GLM 4.5 Air$0.051Exceeds the context window
GPT-4o (2024-08-06)$0.600Exceeds the context window

GLM 4.5 Air 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 4.5 Air and GPT-4o (2024-08-06)
SpecificationZ.ai GLM 4.5 AirOpenAI GPT-4o (2024-08-06)
MakerZ.aiOpenAI
WeightsOpen weightsNo public weights listed
ReleasedJuly 25, 2025August 6, 2024
Context window131K128K
Input $/Mtok$0.20$2.50
Output $/Mtok$1.10$10.00
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GLM 4.5 Air better than GPT-4o (2024-08-06) for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GLM 4.5 Air for output tokens 9.1x cheaper ($1.10 vs $10.00 per million) and a larger context window (131K against 128K tokens).

Which is cheaper, GLM 4.5 Air or GPT-4o (2024-08-06)?

GLM 4.5 Air costs $0.20 per million input tokens and $1.10 per million output tokens; GPT-4o (2024-08-06) costs $2.50 and $10.00. Cost per solved task is known for neither of them.

Which has the bigger context window, GLM 4.5 Air or GPT-4o (2024-08-06)?

GLM 4.5 Air, with 131K tokens against 128K.

How many benchmarks is the GLM 4.5 Air vs GPT-4o (2024-08-06) comparison based on?

35 benchmarks have a result for both models as of October 22, 2026. GLM 4.5 Air's coding index rests on 0 independent benchmarks and GPT-4o (2024-08-06)'s on 0. Where only one model has a result, the page says so instead of naming a winner.

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