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GLM 4.5 Air vs GPT-5.4 Nano

GPT-5.4 Nano leads GLM 4.5 Air on the Artificial Analysis Intelligence Index, 20.7 to 11.1, at about the same output price ($1.25 vs $1.10 per million). Updated October 22, 2026; 36 benchmarks have a result for both.

Replace GLM 4.5 Air Replace GPT-5.4 Nano
GLM 4.5 AirZ.ai
Coding
No data
Overall
No data
Output $/M
$1.10
20
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
16
vs boards won of 36 shared

GLM 4.5 Air or GPT-5.4 Nano: which to pick

Only GPT-5.4 Nano has a coding score, 44.8 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 1.1x cheaper ($1.10 vs $1.25 per million) and work measured by LMArena Text: hard prompts in English or Kagi LLM Benchmark, where it leads.

Model AGLM 4.5 AirZ.aiNot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved task
Shared results
36
GLM 4.5 Air only
13
GPT-5.4 Nano only
49
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-5.4 Nano 44.8 from 2 benchmarks.
Widest category
Agentic work, 29.5 points apart on average over 1 shared benchmark.
Widest single gap
IFBench: GLM 4.5 Air 37.6% against GPT-5.4 Nano 75.9%, 38.4 points apart on a 0 to 100 scale.
Output price
GLM 4.5 Air $1.10 against GPT-5.4 Nano $1.25 per million output tokens, 1.1x apart.
Context window
GLM 4.5 Air takes 131K tokens, GPT-5.4 Nano 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-5.4 NanoTies
Coding03
Intelligence01
Agentic work01
Reasoning24
Math02
Knowledge40
General145
All shared boards2016
CodingLike-for-likeSix of these boards feed the Vibe Coding Index03
Coding benchmarks for GLM 4.5 Air and GPT-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
AA Coding IndexNot measured56.1Only GPT-5.4 Nano measured
LiveCodeBench (Vals AI)Not measured84.0%Only GPT-5.4 Nano measured
SWE-bench Verified (Vals AI)Not measured69.8%Only GPT-5.4 Nano measured
Vibe Code Bench (Vals AI)Not measured26.1%Only GPT-5.4 Nano measured
Code migration (Vals AI)Not measured14.5%Only GPT-5.4 Nano measured
Terminal-Bench 2.1 (Vals AI)Not measured41.6%Only GPT-5.4 Nano measured
LiveCodeBench (Artificial Analysis run)68.4%Not measuredOnly GLM 4.5 Air measured
SciCodeNot measured47.2%Only GPT-5.4 Nano measured
Terminal-Bench Hard (Artificial Analysis run)20.5%42.4%GPT-5.4 Nano
GSO-Bench2.9%Not measuredOnly GLM 4.5 Air measured
WeirdMLNot measured49.2%Only GPT-5.4 Nano measured
ALE-BenchNot measured1004.5Only GPT-5.4 Nano measured
LMArena Text: coding13971404GPT-5.4 Nano
LMArena Text: software and IT14011402GPT-5.4 Nano
Neither model has a result on the other 29 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GLM 4.5 Air and GPT-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
AA Intelligence Index11.120.7GPT-5.4 Nano
Epoch Capabilities IndexNot measured146.0Only GPT-5.4 Nano measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for GLM 4.5 Air and GPT-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
AA Agentic IndexNot measured16.0Only GPT-5.4 Nano measured
Finance Agent (Vals AI)Not measured38.2%Only GPT-5.4 Nano measured
Tax Agent Bench (Vals AI)Not measured5.0%Only GPT-5.4 Nano measured
Legal Research Bench (Vals AI)Not measured6.3%Only GPT-5.4 Nano measured
Excel Modeling Benchmark (Vals AI)Not measured44.8%Only GPT-5.4 Nano measured
τ²-Bench Telecom46.5%76.0%GPT-5.4 Nano
Neither model has a result on the other 36 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index24
Reasoning benchmarks for GLM 4.5 Air and GPT-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
GPQA DiamondNot measured77.5%Only GPT-5.4 Nano measured
MMMU Pro (Vals AI)Not measured73.6%Only GPT-5.4 Nano measured
GPQA Diamond (Artificial Analysis run)73.3%81.7%GPT-5.4 Nano
Humanity's Last Exam (Artificial Analysis run)7.0%28.3%GPT-5.4 Nano
GPQA Diamond (Epoch AI run)Not measured78.5%Only GPT-5.4 Nano measured
ARC-AGINot measured51.5%Only GPT-5.4 Nano measured
ARC-AGI-2Not measured5.7%Only GPT-5.4 Nano measured
Chess puzzlesNot measured45.0%Only GPT-5.4 Nano measured
Mystery game puzzlesNot measured9.0%Only GPT-5.4 Nano measured
LMArena Text: hard prompts13791381GPT-5.4 Nano
LMArena Text: expert13701396GPT-5.4 Nano
LMArena Text: hard prompts in English13881387GLM 4.5 Air
LMArena Vision: diagramsNot measured1210Only GPT-5.4 Nano measured
LMArena Vision: homeworkNot measured1225Only GPT-5.4 Nano measured
Kagi LLM Benchmark43.0%39.7%GLM 4.5 Air
Neither model has a result on the other 8 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for GLM 4.5 Air and GPT-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
AIMENot measured88.8%Only GPT-5.4 Nano 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 measured87.8%Only GPT-5.4 Nano measured
FrontierMath, tiers 1 to 3Not measured44.9%Only GPT-5.4 Nano measured
FrontierMath, tier 4Not measured12.2%Only GPT-5.4 Nano measured
ProofBenchNot measured5.0%Only GPT-5.4 Nano measured
LMArena Text: math13961405GPT-5.4 Nano
LMArena Text: mathematical work13961409GPT-5.4 Nano
MathArena12.0%Not measuredOnly GLM 4.5 Air measured
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for GLM 4.5 Air and GPT-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
MMLU ProNot measured77.2%Only GPT-5.4 Nano measured
LegalBench (Vals AI)Not measured77.9%Only GPT-5.4 Nano measured
CaseLaw (Vals AI)Not measured51.9%Only GPT-5.4 Nano measured
CorpFin (Vals AI)Not measured61.2%Only GPT-5.4 Nano measured
TaxEval (Vals AI)Not measured67.4%Only GPT-5.4 Nano measured
MortgageTax (Vals AI)Not measured59.1%Only GPT-5.4 Nano measured
MedCode (Vals AI)Not measured41.0%Only GPT-5.4 Nano measured
MMLU Pro (Artificial Analysis run)81.5%Not measuredOnly GLM 4.5 Air measured
SimpleQA VerifiedNot measured11.7%Only GPT-5.4 Nano measured
LMArena Text: science14071374GLM 4.5 Air
LMArena Text: medicine and healthcare14021369GLM 4.5 Air
LMArena Text: legal and government13821368GLM 4.5 Air
LMArena Text: business and finance13711366GLM 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-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
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 index145
General benchmarks for GLM 4.5 Air and GPT-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
SAGE (Vals AI)Not measured38.1%Only GPT-5.4 Nano measured
MedScribe (Vals AI)Not measured77.1%Only GPT-5.4 Nano measured
Vals Multimodal IndexNot measured47.6%Only GPT-5.4 Nano measured
IFBench37.6%75.9%GPT-5.4 Nano
Long context reasoning (AA-LCR)46.7%76.7%GPT-5.4 Nano
DTBenchNot measured80.3%Only GPT-5.4 Nano measured
LMCANot measured36.9%Only GPT-5.4 Nano measured
LMArena Text13841372GLM 4.5 Air
LMArena Text: instruction following13541362GPT-5.4 Nano
LMArena Text: creative writing13431315GLM 4.5 Air
LMArena VisionNot measured1196Only GPT-5.4 Nano measured
LMArena Text: English13971381GLM 4.5 Air
LMArena Text: non-English13661359GLM 4.5 Air
LMArena Text: Chinese14261391GLM 4.5 Air
LMArena Text: German13771368GLM 4.5 Air
LMArena Text: Japanese13481343GLM 4.5 Air
LMArena Text: Korean13081321GPT-5.4 Nano
LMArena Text: French14001395GLM 4.5 Air
LMArena Text: Spanish13851371GLM 4.5 Air
LMArena Text: Russian13731363GLM 4.5 Air
LMArena Text: Polish13681366GLM 4.5 Air
LMArena Text: multi-turn13711382GPT-5.4 Nano
LMArena Text: longer queries13661365GLM 4.5 Air
LMArena Text: writing and language13541338GLM 4.5 Air
LMArena Text: entertainment and media13391325GLM 4.5 Air
LMArena Vision: EnglishNot measured1202Only GPT-5.4 Nano measured
LMArena Vision: ChineseNot measured1232Only GPT-5.4 Nano measured
LMArena Vision: reading textNot measured1204Only GPT-5.4 Nano measured
LMArena Vision: humorNot measured1161Only GPT-5.4 Nano measured
LMArena Vision: recognizing thingsNot measured1141Only GPT-5.4 Nano measured
LMArena Vision: creative writingNot measured1159Only GPT-5.4 Nano 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 GLM 4.5 Air and GPT-5.4 Nano
BenchmarkGLM 4.5 AirGPT-5.4 NanoLeader
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-5.4 Nano$0.0008Fits 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-5.4 Nano$0.014Fits 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-5.4 Nano$0.052Fits 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-5.4 Nano
SpecificationZ.ai GLM 4.5 AirOpenAI GPT-5.4 Nano
MakerZ.aiOpenAI
WeightsOpen weightsNo public weights listed
ReleasedJuly 25, 2025March 17, 2026
Context window131K400K
Input $/Mtok$0.20$0.20
Output $/Mtok$1.10$1.25
Coding indexNot benchmarked44.8
Independent measurements behind it02
Cost per solved taskNot computable$0.14
SourceOpenRouter listingOpenRouter listing

Questions

Is GLM 4.5 Air better than GPT-5.4 Nano for coding?

Only GPT-5.4 Nano has a coding score, 44.8 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 1.1x cheaper ($1.10 vs $1.25 per million) and work measured by LMArena Text: hard prompts in English or Kagi LLM Benchmark, where it leads.

Which is cheaper, GLM 4.5 Air or GPT-5.4 Nano?

GLM 4.5 Air costs $0.20 per million input tokens and $1.10 per million output tokens; GPT-5.4 Nano costs $0.20 and $1.25. Cost per solved task is known for GPT-5.4 Nano only.

Which has the bigger context window, GLM 4.5 Air or GPT-5.4 Nano?

GPT-5.4 Nano, with 400K tokens against 131K.

How many benchmarks is the GLM 4.5 Air vs GPT-5.4 Nano comparison based on?

36 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-5.4 Nano's on 2. Where only one model has a result, the page says so instead of naming a winner.

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