Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

Z.ai: GLM 4.5 Air vs GPT-4o benchmark

Name: Z.ai: GLM 4.5 Air vs GPT-4o AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Z.ai: GLM 4.5 Air (Zhipu) and GPT-4o (OpenAI) using the latest snapshots we have as of Aug 17, 2026. Z.ai: GLM 4.5 Air wins on output price at $0.85/1M. Z.ai: GLM 4.5 Air has the larger context window (131k tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

Share Analysis:

WhatsApp Telegram X / Post LinkedIn Reddit

Zhipu

Z.ai: GLM 4.5 Air

Auto-discovered from OpenRouter (z-ai/glm-4.5-air). Preview until a second source matches.

$0.85/1M out

OpenAI

GPT-4o

Previous OpenAI flagship. Still a common compare baseline on legacy pages.

Elo 1,335$10/1M out

Swap or Add Any Model to this Matchup

Instant pairwise benchmark recalculation across 400+ LLMs

Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Z.ai: GLM 4.5 Air (3)vsGPT-4o (6)

Z.ai: GLM 4.5 Air: 3W (33%)Overall: GPT-4oGPT-4o: 6W (67%)

← Z.ai: GLM 4.5 AirGPT-4o →

GPT-4o (4/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

—vs1,335

Coding Elo

—vs—

SWE-bench

—vs54.8%

LiveBench

—vs54.2%

GPQA Diamond

—vs73.2%

Z.ai: GLM 4.5 Air: 0WGPT-4o: 4W

GPT-4o (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

—vs110 tok/s

Time to first token

—vs180 ms

Z.ai: GLM 4.5 Air: 0WGPT-4o: 2W

Z.ai: GLM 4.5 Air (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$0.85/1Mvs$10/1M

Input price

$0.13/1Mvs$2.5/1M

Context window

131kvs128k

Z.ai: GLM 4.5 Air: 3WGPT-4o: 0W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageGPT-4o 4/6

Preference Elo

No shared data

Throughput Speed

No shared data

Token Price Efficiency

Z.ai: GLM 4.5 Air

$9.15/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

—

EloHigh is better

1,335

LiveBench

High is better

—

LiveBenchHigh is better

54.2%

SWE-bench

High is better

—

SWE-benchHigh is better

54.8%

GPQA

High is better

—

GPQAHigh is better

73.2%

TTFT

Low is better

—

TTFTLow is better

180 ms

Speed

High is better

—

SpeedHigh is better

110 tok/s

In $

Low is better

+1823%$0.13 / 1M

In $Low is better

$2.50 / 1M

Out $

Low is better

+1076%$0.85 / 1M

Out $Low is better

$10.00 / 1M

Context

High is better

+2%131k

ContextHigh is better

128k

Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 93% with Z.ai: GLM 4.5 Air

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Z.ai: GLM 4.5 Air$17.30 / mo

In: $4.55Out: $12.75

GPT-4o$237.50 / mo

In: $87.5Out: $150

Estimated Cost Delta

Z.ai: GLM 4.5 Air is estimated to save $220.20/month ($2,642/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Z.ai: GLM 4.5 Air:Pick Z.ai: GLM 4.5 Air when you are optimizing output cost.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatZ.ai: GLM 4.5 Air

Lower output list price ($0.85/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGZ.ai: GLM 4.5 Air

Larger window (131k).

Screenshots / visionGPT-4o

GPT-4o is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Z.ai: GLM 4.5 Air	Lower output list price ($0.85/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Z.ai: GLM 4.5 Air	Larger window (131k).
Screenshots / vision	GPT-4o	GPT-4o is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

newsMay 13, 2024

GPT-4o stays as the 2024 compare anchor people still search

Deprecated for buying. Kept because “4o vs sonnet” is still a typed query.

Community Sentiment

Cast Your Matchup Vote

0 total votes

Community Discussions (0)

No comments posted on this matchup yet. Be the first to share an evaluation note!

Share card

The real PNG is generated at /compare/glm-4-5-air-vs-gpt-4o/opengraph-image for crawlers.

PNG

CompareLLM Matrix

Verified head-to-head card

LIVE

Zhipu

Z.ai: GLM 4.5 Air

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost$0.85/1M

OpenAI

GPT-4o

Elo 1,335

LiveBench54.2%

SWE-bench54.8%

Speed110 tok/s

Output cost$10/1M

Frequently Asked Questions

Which is better overall, Z.ai: GLM 4.5 Air or GPT-4o?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Z.ai: GLM 4.5 Air or GPT-4o?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: Z.ai: GLM 4.5 Air output tokens are $0.85/1M versus $10/1M. Input prices and retry rates still move the real bill.
Which is faster, Z.ai: GLM 4.5 Air or GPT-4o?: We do not have TTFT for both models.
Which has the larger context window?: Z.ai: GLM 4.5 Air accepts 131k tokens versus 128k.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Z.ai: GLM 4.5 Air and GPT-4o Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Z.ai: GLM 4.5 Air matchups →|All GPT-4o matchups →

GPT-4o vs GPT-4 Turbo (previous gpt-flagship)GPT-4o vs OpenAI: o1 (next gpt-flagship)GPT-5 vs GPT-4o GPT-4.5 Orion vs GPT-4o GPT-5.6 Sol vs GPT-4o GPT-5.6 Terra vs GPT-4o

Z.ai: GLM 4.5 Air vs GPT-4o benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Z.ai: GLM 4.5 Air (3)vsGPT-4o (6)

Z.ai: GLM 4.5 Air: 3W (33%)Overall: GPT-4oGPT-4o: 6W (67%)

← Z.ai: GLM 4.5 AirGPT-4o →

GPT-4o (4/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

—vs1,335

Coding Elo

—vs—

SWE-bench

—vs54.8%

LiveBench

—vs54.2%

GPQA Diamond

—vs73.2%

Z.ai: GLM 4.5 Air: 0WGPT-4o: 4W

GPT-4o (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

—vs110 tok/s

Time to first token

—vs180 ms

Z.ai: GLM 4.5 Air: 0WGPT-4o: 2W

Z.ai: GLM 4.5 Air (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$0.85/1Mvs$10/1M

Input price

$0.13/1Mvs$2.5/1M

Context window

131kvs128k

Z.ai: GLM 4.5 Air: 3WGPT-4o: 0W

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatZ.ai: GLM 4.5 Air

Lower output list price ($0.85/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGZ.ai: GLM 4.5 Air

Larger window (131k).

Screenshots / visionGPT-4o

GPT-4o is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Z.ai: GLM 4.5 Air	Lower output list price ($0.85/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Z.ai: GLM 4.5 Air	Larger window (131k).
Screenshots / vision	GPT-4o	GPT-4o is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, Z.ai: GLM 4.5 Air or GPT-4o?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, Z.ai: GLM 4.5 Air or GPT-4o?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

Z.ai: GLM 4.5 Air output tokens are $0.85/1M versus $10/1M. Input prices and retry rates still move the real bill.

Which is faster, Z.ai: GLM 4.5 Air or GPT-4o?

We do not have TTFT for both models.

Which has the larger context window?

Z.ai: GLM 4.5 Air accepts 131k tokens versus 128k.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Z.ai: GLM 4.5 Air and GPT-4o Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

Z.ai: GLM 4.5 Air

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

GPT-4o stays as the 2024 compare anchor people still search

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Z.ai: GLM 4.5 Air

GPT-4o

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

Z.ai: GLM 4.5 Air

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

GPT-4o stays as the 2024 compare anchor people still search

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Z.ai: GLM 4.5 Air

GPT-4o

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons