The Known Good Updated 8 Oct 2026 Subscribe
Z.ai: GLM 5 vs Z.ai: GLM 5.2 ·Z.ai vs Z.ai

Z.ai: GLM 5 vs Z.ai: GLM 5.2 — head-to-head comparison

Z.ai: GLM 5 profile Z.ai: GLM 5.2 profile All comparisons
Z.ai: GLM 5 — Z.ai
Quality
#20 of 65
77based on 4 of 7 evaluations
Known Good Index
Speed
#205 of 356
57.1
Output tokens per second
Price
#260 of 504
$0.93
Blended per 1M tokens
In $0.60 · Out $1.92
Cache hit price
#223 of 384
$0.12
per 1M tokens (−80%)
Context
#357 of 550
205k
tokens (~300 pages)
Z.ai: GLM 5.2 — Z.ai
Quality
#8 of 65
91based on 3 of 7 evaluations
Known Good Index
Speed
#121 of 356
83.3
Output tokens per second
Price
#269 of 504
$0.96
Blended per 1M tokens
In $0.08 · Out $3.60
Cache hit price
#189 of 384
$0.083
per 1M tokens (−1%)
Context
#106 of 550
1.05M
tokens (~1,600 pages)
Summary

On the Known Good Index, Z.ai: GLM 5 scores 77 and Z.ai: GLM 5.2 scores 91 — a 14-point lead for Z.ai: GLM 5.2. They share 3 published evaluations, with Z.ai: GLM 5 ahead on 0 and Z.ai: GLM 5.2 ahead on 3.

Blended pricing is $0.93 per 1M tokens for Z.ai: GLM 5 and $0.96 for Z.ai: GLM 5.2, within 10% of each other.

Throughput is 57 tokens per second for Z.ai: GLM 5 and 83 for Z.ai: GLM 5.2, with time to first token at 2.6s and 1.3s. Z.ai: GLM 5 accepts 205k tokens of context against 1.05M.

Z.ai: GLM 5 is open weights under Open weights (unrestricted); Z.ai: GLM 5.2 is open weights under Open weights (unrestricted). 38 tracked hosts serve one or both, and 13 serve both.

Generated from tracked data on 8 Oct 2026 · how these comparisons are computed →

At a glance
MetricZ.ai: GLM 5Z.ai: GLM 5.2
Known Good Index 77 based on 4 of 7 evaluations 91 based on 3 of 7 evaluations
Blended $/1M $0.93 $0.96
Output tok/s 57 83
Context window 205k 1.05M
Providers 14 37
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Quality

Known Good Index and the capability indices, side by side

Index scores

Each index is min-max normalised across tracked models and scaled 0–100 from published evaluations. We do not run these evaluations.

MetricZ.ai: GLM 5Z.ai: GLM 5.2
Known Good Index 77 91
Coding Index 69 —
Openness Index 60 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = Z.ai: GLM 5 · marker = Z.ai: GLM 5.2 · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond88 / 92
Mock AIME 2024–2580 / 86
SWE-bench Verified72 / 79

Right-hand figures read Z.ai: GLM 5 / Z.ai: GLM 5.2. Z.ai: GLM 5 leads on 0 of 3, Z.ai: GLM 5.2 on 3.

The Known Good

Arena Elo

Human preference rating from blind pairwise votes

Arena ratings

Elo from blind pairwise votes, ingested from Arena. Higher is better.

MetricZ.ai: GLM 5Z.ai: GLM 5.2
Text Arena 1,446 1,464
Text Arena (style controlled) 1,458 1,469
The Known Good

Price & Cost

Published API pricing by token type

Published pricing

USD per 1M tokens. Blended is a 3:1 input:output mix. Live from OpenRouter, cross-checked against models.dev. Lower is better.

MetricZ.ai: GLM 5Z.ai: GLM 5.2
Input $/1M $0.60 $0.08
Output $/1M $1.92 $3.60
Blended $/1M $0.93 $0.96
Cache read $/1M $0.120 $0.083
The Known Good
We publish blended price rather than cost-per-task. Cost-per-task requires token counts from an evaluation suite we do not run. Blended price is computed from published rates and is fully reproducible — see the pricing methodology.

Context Window

Maximum input accepted and maximum output emitted

Context and output limits

Provider-declared limits, from metadata via models.dev and OpenRouter. Higher is better.

MetricZ.ai: GLM 5Z.ai: GLM 5.2
Context window 205k 1.05M
Max output tokens 128k 944k
The Known Good

Speed & Latency

Mean throughput and time to first token across hosting providers, over successful measurements from the last 48 hours

Throughput and latency

Means across all tracked providers over successful measurements from the last 48 hours, derived from OpenRouter endpoint telemetry.

MetricZ.ai: GLM 5Z.ai: GLM 5.2
Output tokens/s 57 83
Time to first token 2.6s 1.3s
The Known Good

Providers

Which hosts serve each model, and at what price and speed

38 hosts · 13 serve both
Full provider benchmarks →
Provider Z.ai: GLM 5 blendedZ.ai: GLM 5 tok/s Z.ai: GLM 5.2 blendedZ.ai: GLM 5.2 tok/s
Amazon Bedrock · first party $1.55 111 — —
Baidu · first party $1.08 65 $0.29 78
Venice $1.55 65 $2.15 84
Z.AI · first party $1.55 48 $2.15 50
Chutes $1.35 45 $1.93 4
GMICloud $0.93 43 $2.15 42
Novita $1.55 41 $1.00 45
StreamLake $0.93 39 $0.86 54
SiliconFlow $1.35 36 $1.83 93
AtlasCloud $1.50 35 $1.44 58
DeepInfra $0.97 16 $0.87 75
DigitalOcean $1.55 7 $1.07 91
Parasail $1.55 — $2.15 98
Phala $1.77 — $1.70 79
BaseTen — — $2.15 206
Decart — — $0.64 203
Nebius — — $2.15 150
Reka · first party — — $1.60 149
Together — — $2.15 142
Inceptron — — $2.14 141
InferenceNet — — $1.25 125
Wafer — — $0.96 121
Friendli — — $2.15 110
Mistral · first party — — $2.15 110
ModelRun — — $3.35 108
CoreWeave — — $1.18 101
Crusoe — — $2.15 100
Relace — — $1.13 85
Makora — — $1.14 78
Alibaba · first party — — $1.48 76
Morph — — $1.40 72
Cloudflare — — $1.99 64
Io Net — — $1.33 56
Sail Research — — $1.16 37
Ambient — — $0.95 30
Ionstream — — $2.15 30
AkashML — — $1.18 27
Fireworks — — $2.15 —

Per-host pricing and telemetry from OpenRouter. A dash means that host does not serve that model.

The Known Good
Sources for this page
Pricing & providers — OpenRouter Metadata — models.dev Benchmarks — Epoch AI (CC-BY 4.0)Elo — Arena Full attribution →