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GLM 4.5 Air vs o3 Mini

Updated October 21, 2026. 38 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace GLM 4.5 Air Replace o3 Mini
GLM 4.5 AirZ.ai
Coding
No data
Overall
11.1
Output $/M
$1.10
30
o3 MiniOpenAI
Coding
No data
Overall
12.5
Output $/M
$4.40
8
vs boards won of 38 shared

Decision reading

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

GLM 4.5 Air has the edge where output tokens cost 4.0x less, and where what matters is LiveCodeBench (Artificial Analysis run) or AA Intelligence Index, where it leads.

Model AGLM 4.5 AirZ.aiNot benchmarkedNo coding benchmarkNo cost per solved taskModel Bo3 MiniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
38
GLM 4.5 Air only
9
o3 Mini only
32
Like-for-like categories
7 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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, o3 Mini not benchmarked.
Widest category
Agentic work, 15.2 points apart on average over 1 shared benchmark.
Widest single gap
IFBench: GLM 4.5 Air 37.6% against o3 Mini 67.1%, 29.6 points apart on a 0 to 100 scale.
Output price
GLM 4.5 Air $1.10 against o3 Mini $4.40 per million output tokens, 4.0x apart.
Context window
GLM 4.5 Air takes 131K tokens, o3 Mini 200K.

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 AirBarso3 MiniTies
Coding41
Intelligence01
Agentic work10
Reasoning32
Math02
Knowledge50
General172
All shared boards308
CodingLike-for-likeSix of these boards feed the Vibe Coding Index41
Coding benchmarks for GLM 4.5 Air and o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
Aider polyglotNot measured60.4%Only o3 Mini measured
SWE-bench VerifiedNot measured42.4%Only o3 Mini measured
SWE-bench LiteNot measured32.3%Only o3 Mini measured
LiveCodeBench (Vals AI)Not measured71.5%Only o3 Mini measured
LiveCodeBench (Artificial Analysis run)68.4%73.4%o3 Mini
SciCodeNot measured42.8%Only o3 Mini measured
Terminal-Bench Hard (Artificial Analysis run)20.5%6.8%GLM 4.5 Air
GSO-Bench2.9%1.3%GLM 4.5 Air
WeirdMLNot measured43.7%Only o3 Mini measured
CybenchNot measured22.5%Only o3 Mini measured
LMArena Text: coding13971378GLM 4.5 Air
LMArena Text: software and IT14011364GLM 4.5 Air
Neither model has a result on the other 26 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GLM 4.5 Air and o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
AA Intelligence Index11.112.5o3 Mini
Epoch Capabilities IndexNot measured140.2Only o3 Mini measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GLM 4.5 Air and o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
τ²-Bench Telecom46.5%31.3%GLM 4.5 Air
Neither model has a result on the other 38 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index32
Reasoning benchmarks for GLM 4.5 Air and o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
GPQA DiamondNot measured75.5%Only o3 Mini measured
GPQA Diamond (Artificial Analysis run)73.3%77.3%o3 Mini
Humanity's Last Exam (Artificial Analysis run)7.0%12.0%o3 Mini
GPQA Diamond (Epoch AI run)Not measured77.0%Only o3 Mini measured
ARC-AGINot measured34.5%Only o3 Mini measured
ARC-AGI-2Not measured3.0%Only o3 Mini measured
SimpleBenchNot measured22.8%Only o3 Mini measured
Chess puzzlesNot measured15.0%Only o3 Mini measured
Mystery game puzzlesNot measured7.0%Only o3 Mini measured
LMArena Text: hard prompts13791365GLM 4.5 Air
LMArena Text: expert13701364GLM 4.5 Air
LMArena Text: hard prompts in English13881375GLM 4.5 Air
Neither model has a result on the other 9 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for GLM 4.5 Air and o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
AIMENot measured86.5%Only o3 Mini measured
MATH 500 (Vals AI)Not measured91.8%Only o3 Mini measured
MGSM (Vals AI)Not measured91.3%Only o3 Mini 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 measured76.9%Only o3 Mini measured
FrontierMath, tiers 1 to 3Not measured18.6%Only o3 Mini measured
FrontierMath, tier 4Not measured0.0%Only o3 Mini measured
MATH level 5Not measured96.5%Only o3 Mini measured
LMArena Text: math13961396o3 Mini
LMArena Text: mathematical work13961399o3 Mini
Neither model has a result on the other 2 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
Knowledge benchmarks for GLM 4.5 Air and o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
MMLU ProNot measured78.7%Only o3 Mini measured
LegalBench (Vals AI)Not measured71.5%Only o3 Mini measured
CorpFin (Vals AI)Not measured45.3%Only o3 Mini measured
TaxEval (Vals AI)Not measured69.4%Only o3 Mini measured
MedQA (Vals AI)Not measured94.8%Only o3 Mini measured
MMLU Pro (Artificial Analysis run)81.5%80.2%GLM 4.5 Air
SimpleQA VerifiedNot measured15.3%Only o3 Mini measured
LMArena Text: science14071339GLM 4.5 Air
LMArena Text: medicine and healthcare14021330GLM 4.5 Air
LMArena Text: legal and government13821328GLM 4.5 Air
LMArena Text: business and finance13711313GLM 4.5 Air
Neither model has a result on the other 6 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 o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
Design Arena: websites1147Not measuredOnly GLM 4.5 Air measured
Design Arena: UI components1123Not measuredOnly GLM 4.5 Air measured
Design Arena: game dev1094Not 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: SVG1071Not 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 index172
General benchmarks for GLM 4.5 Air and o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
IFBench37.6%67.1%o3 Mini
Long context reasoning (AA-LCR)46.7%43.0%GLM 4.5 Air
DTBenchNot measured68.8%Only o3 Mini measured
LMCANot measured19.0%Only o3 Mini measured
Fiction.LiveBenchNot measured50.0%Only o3 Mini measured
Creative writing (Lech Mazur)Not measured61.7%Only o3 Mini measured
LMArena Text13841337GLM 4.5 Air
LMArena Text: instruction following13541337GLM 4.5 Air
LMArena Text: creative writing13431286GLM 4.5 Air
LMArena Text: English13971351GLM 4.5 Air
LMArena Text: non-English13661319GLM 4.5 Air
LMArena Text: Chinese14261379GLM 4.5 Air
LMArena Text: German13771303GLM 4.5 Air
LMArena Text: Japanese13481286GLM 4.5 Air
LMArena Text: Korean13081313o3 Mini
LMArena Text: French14001334GLM 4.5 Air
LMArena Text: Spanish13851321GLM 4.5 Air
LMArena Text: Russian13731304GLM 4.5 Air
LMArena Text: Polish13681294GLM 4.5 Air
LMArena Text: multi-turn13711320GLM 4.5 Air
LMArena Text: longer queries13661343GLM 4.5 Air
LMArena Text: writing and language13541313GLM 4.5 Air
LMArena Text: entertainment and media13391283GLM 4.5 Air
Neither model has a result on the other 23 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 o3 Mini
BenchmarkGLM 4.5 Airo3 MiniLeader
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
o3 Mini$0.0033Fits 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
o3 Mini$0.068Fits 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
o3 Mini$0.264Exceeds 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 o3 Mini
SpecificationZ.ai GLM 4.5 AirOpenAI o3 Mini
MakerZ.aiOpenAI
WeightsOpen weightsNo public weights listed
ReleasedJuly 25, 2025January 31, 2025
Context window131K200K
Input $/Mtok$0.20$1.10
Output $/Mtok$1.10$4.40
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 o3 Mini for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. GLM 4.5 Air has the edge where output tokens cost 4.0x less, and where what matters is LiveCodeBench (Artificial Analysis run) or AA Intelligence Index, where it leads.

Which is cheaper, GLM 4.5 Air or o3 Mini?

GLM 4.5 Air costs $0.20 per million input tokens and $1.10 per million output tokens; o3 Mini costs $1.10 and $4.40. Cost per solved task is known for neither of them.

Which has the bigger context window, GLM 4.5 Air or o3 Mini?

o3 Mini, with 200K tokens against 131K.

How many benchmarks is the GLM 4.5 Air vs o3 Mini comparison based on?

38 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 o3 Mini's on 0. Where only one model has a result, the page says so instead of naming a winner.

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