Enter opens the highlighted result. Esc closes.

GLM 4.5 Air vs GPT-5

GPT-5 leads GLM 4.5 Air on the Artificial Analysis Intelligence Index, 23.0 to 11.1, and GLM 4.5 Air costs 9.1x less per output token ($1.10 vs $10.00 per million). Updated October 21, 2026; 48 benchmarks have a result for both.

Replace GLM 4.5 Air Replace GPT-5
GLM 4.5 AirZ.ai
Coding
No data
Overall
No data
Output $/M
$1.10
2
GPT-5OpenAI
Coding
38.8
Overall
51.5
Output $/M
$10.00
46
vs boards won of 48 shared

GLM 4.5 Air or GPT-5: which to pick

Only GPT-5 has a coding score, 38.8 on the Vibe Coding Index; GLM 4.5 Air has none, 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 work measured by Design Arena: 3D or LMArena Text: Chinese, where it leads.

Model AGLM 4.5 AirZ.aiNot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-5OpenAI38.8/1003 independent benchmarks$0.39 per solved task
Shared results
48
GLM 4.5 Air only
0
GPT-5 only
65
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 4.5 Air not benchmarked, GPT-5 38.8 from 3 benchmarks.
Widest category
Agentic work, 40.1 points apart on average over 1 shared benchmark.
Widest single gap
τ²-Bench Telecom: GLM 4.5 Air 46.5% against GPT-5 86.5%, 40.1 points apart on a 0 to 100 scale.
Output price
GLM 4.5 Air $1.10 against GPT-5 $10.00 per million output tokens, 9.1x apart.
Context window
GLM 4.5 Air takes 131K tokens, GPT-5 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 4.5 AirBarsGPT-5Ties
Coding05
Intelligence01
Agentic work01
Reasoning06
Math04
Knowledge05
Web design16
General118
All shared boards246
CodingLike-for-likeSix of these boards feed the Vibe Coding Index05
Coding benchmarks for GLM 4.5 Air and GPT-5
BenchmarkGLM 4.5 AirGPT-5Leader
Aider polyglotNot measured88.0%Only GPT-5 measured
SWE-bench VerifiedNot measured74.4%Only GPT-5 measured
LMArena WebDevNot measured1418Only GPT-5 measured
AA Coding IndexNot measured37.8Only GPT-5 measured
LiveCodeBench (Vals AI)Not measured85.9%Only GPT-5 measured
SWE-bench Verified (Vals AI)Not measured69.0%Only GPT-5 measured
Vibe Code Bench (Vals AI)Not measured20.1%Only GPT-5 measured
LiveCodeBench (Artificial Analysis run)68.4%84.6%GPT-5
Terminal-Bench Hard (Artificial Analysis run)20.5%37.9%GPT-5
Terminal-BenchNot measured49.6%Only GPT-5 measured
GSO-Bench2.9%6.9%GPT-5
WeirdMLNot measured60.7%Only GPT-5 measured
ALE-BenchNot measured807.6Only GPT-5 measured
LMArena Text: coding13971436GPT-5
LMArena Text: software and IT14011420GPT-5
LMArena WebDev: HTMLNot measured1427Only GPT-5 measured
SciCodeNot measured0.0%Only GPT-5 measured
Neither model has a result on the other 22 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GLM 4.5 Air and GPT-5
BenchmarkGLM 4.5 AirGPT-5Leader
AA Intelligence Index11.123.0GPT-5
Epoch Capabilities IndexNot measured150.0Only GPT-5 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for GLM 4.5 Air and GPT-5
BenchmarkGLM 4.5 AirGPT-5Leader
τ²-Bench Telecom46.5%86.5%GPT-5
METR time horizonsNot measured69.6%Only GPT-5 measured
Remote Labor IndexNot measured1.7%Only GPT-5 measured
GDPvalNot measured34.8%Only GPT-5 measured
BALROGNot measured32.8%Only GPT-5 measured
DeepResearch BenchNot measured49.6%Only GPT-5 measured
BrowseComp-PlusNot measured80.0%Only GPT-5 measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index06
Reasoning benchmarks for GLM 4.5 Air and GPT-5
BenchmarkGLM 4.5 AirGPT-5Leader
GPQA DiamondNot measured85.6%Only GPT-5 measured
MMMU Pro (Vals AI)Not measured81.5%Only GPT-5 measured
GPQA Diamond (Artificial Analysis run)73.3%85.4%GPT-5
Humanity's Last Exam (Artificial Analysis run)7.0%28.5%GPT-5
GPQA Diamond (Epoch AI run)Not measured86.2%Only GPT-5 measured
ARC-AGINot measured65.7%Only GPT-5 measured
ARC-AGI-2Not measured9.9%Only GPT-5 measured
SimpleBenchNot measured56.7%Only GPT-5 measured
Chess puzzlesNot measured36.0%Only GPT-5 measured
Mystery game puzzlesNot measured23.0%Only GPT-5 measured
EBR-benchNot measured12.7%Only GPT-5 measured
VPCTNot measured66.0%Only GPT-5 measured
LMArena Text: hard prompts13791415GPT-5
LMArena Text: expert13701419GPT-5
LMArena Text: hard prompts in English13881419GPT-5
LMArena Vision: diagramsNot measured1252Only GPT-5 measured
LMArena Vision: homeworkNot measured1278Only GPT-5 measured
Kagi LLM Benchmark43.0%72.7%GPT-5
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index04
Math benchmarks for GLM 4.5 Air and GPT-5
BenchmarkGLM 4.5 AirGPT-5Leader
AIMENot measured93.4%Only GPT-5 measured
MATH 500 (Vals AI)Not measured96.0%Only GPT-5 measured
MGSM (Vals AI)Not measured92.8%Only GPT-5 measured
AA Math Index80.794.3GPT-5
AIME 2025 (Artificial Analysis run)80.7%94.3%GPT-5
OTIS Mock AIMENot measured91.4%Only GPT-5 measured
FrontierMath, tiers 1 to 3Not measured55.4%Only GPT-5 measured
FrontierMath, tier 4Not measured22.0%Only GPT-5 measured
ProofBenchNot measured18.0%Only GPT-5 measured
MATH level 5Not measured98.1%Only GPT-5 measured
LMArena Text: math13961407GPT-5
LMArena Text: mathematical work13961405GPT-5
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index05
Knowledge benchmarks for GLM 4.5 Air and GPT-5
BenchmarkGLM 4.5 AirGPT-5Leader
MMLU ProNot measured86.5%Only GPT-5 measured
LegalBench (Vals AI)Not measured86.0%Only GPT-5 measured
CaseLaw (Vals AI)Not measured66.5%Only GPT-5 measured
CorpFin (Vals AI)Not measured61.1%Only GPT-5 measured
TaxEval (Vals AI)Not measured73.4%Only GPT-5 measured
MortgageTax (Vals AI)Not measured65.5%Only GPT-5 measured
MedQA (Vals AI)Not measured96.3%Only GPT-5 measured
MedCode (Vals AI)Not measured49.6%Only GPT-5 measured
MMLU Pro (Artificial Analysis run)81.5%87.1%GPT-5
SimpleQA VerifiedNot measured50.1%Only GPT-5 measured
GeoBenchNot measured81.0%Only GPT-5 measured
LMArena Text: science14071416GPT-5
LMArena Text: medicine and healthcare14021413GPT-5
LMArena Text: legal and government13821431GPT-5
LMArena Text: business and finance13711400GPT-5
FACTS Benchmark SuiteNot measured56.5%Only GPT-5 measured
Neither model has a result on the other 2 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index16
Web design benchmarks for GLM 4.5 Air and GPT-5
BenchmarkGLM 4.5 AirGPT-5Leader
Design Arena: websites11461184GPT-5
Design Arena: UI components11231180GPT-5
Design Arena: game dev10941185GPT-5
Design Arena: data viz11861221GPT-5
Design Arena: 3D11231056GLM 4.5 Air
Design Arena: all code categories11371168GPT-5
Design Arena: SVG10711189GPT-5
Design Arena: ASCII artNot measured1141Only GPT-5 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index118
General benchmarks for GLM 4.5 Air and GPT-5
BenchmarkGLM 4.5 AirGPT-5Leader
SAGE (Vals AI)Not measured43.7%Only GPT-5 measured
MedScribe (Vals AI)Not measured83.7%Only GPT-5 measured
IFBench37.6%73.1%GPT-5
Long context reasoning (AA-LCR)46.7%78.2%GPT-5
DTBenchNot measured90.7%Only GPT-5 measured
LMCANot measured40.0%Only GPT-5 measured
Fiction.LiveBenchNot measured97.2%Only GPT-5 measured
Creative writing (Lech Mazur)Not measured86.0%Only GPT-5 measured
LMArena Text13841406GPT-5
LMArena Text: instruction following13541388GPT-5
LMArena Text: creative writing13431365GPT-5
LMArena VisionNot measured1232Only GPT-5 measured
LMArena Text: English13971409GPT-5
LMArena Text: non-English13661397GPT-5
LMArena Text: Chinese14261422GLM 4.5 Air
LMArena Text: German13771416GPT-5
LMArena Text: Japanese13481409GPT-5
LMArena Text: Korean13081360GPT-5
LMArena Text: French14001409GPT-5
LMArena Text: Spanish13851399GPT-5
LMArena Text: Russian13731407GPT-5
LMArena Text: Polish13681431GPT-5
LMArena Text: multi-turn13711426GPT-5
LMArena Text: longer queries13661399GPT-5
LMArena Text: writing and language13541384GPT-5
LMArena Text: entertainment and media13391379GPT-5
LMArena Vision: EnglishNot measured1231Only GPT-5 measured
LMArena Vision: ChineseNot measured1267Only GPT-5 measured
LMArena Vision: reading textNot measured1246Only GPT-5 measured
LMArena Vision: humorNot measured1219Only GPT-5 measured
LMArena Vision: captioningNot measured1212Only GPT-5 measured
LMArena Vision: recognizing thingsNot measured1263Only GPT-5 measured
LMArena Vision: creative writingNot measured1210Only GPT-5 measured
Neither model has a result on the other 13 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-5
BenchmarkGLM 4.5 AirGPT-5Leader
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-5$0.0063Fits 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-5$0.092Fits 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-5$0.350Fits in one request

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-5
SpecificationZ.ai GLM 4.5 AirOpenAI GPT-5
MakerZ.aiOpenAI
WeightsOpen weightsNo public weights listed
ReleasedJuly 25, 2025August 7, 2025
Context window131K400K
Input $/Mtok$0.20$1.25
Output $/Mtok$1.10$10.00
Coding indexNot benchmarked38.8
Independent measurements behind it03
Cost per solved taskNot computable$0.39
SourceOpenRouter listingOpenRouter listing

Questions

Is GLM 4.5 Air better than GPT-5 for coding?

Only GPT-5 has a coding score, 38.8 on the Vibe Coding Index; GLM 4.5 Air has none, 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 work measured by Design Arena: 3D or LMArena Text: Chinese, where it leads.

Which is cheaper, GLM 4.5 Air or GPT-5?

GLM 4.5 Air costs $0.20 per million input tokens and $1.10 per million output tokens; GPT-5 costs $1.25 and $10.00. Cost per solved task is known for GPT-5 only.

Which has the bigger context window, GLM 4.5 Air or GPT-5?

GPT-5, with 400K tokens against 131K.

How many benchmarks is the GLM 4.5 Air vs GPT-5 comparison based on?

48 benchmarks have a result for both models as of October 21, 2026. GLM 4.5 Air's coding index rests on 0 independent benchmarks and GPT-5's on 3. Where only one model has a result, the page says so instead of naming a winner.

Compare next