The Known Good Updated 25 Oct 2026 Subscribe
Google: Gemini 3 Flash Preview vs Z.ai: GLM 5.2 ·Google vs Z.ai

Google: Gemini 3 Flash Preview vs Z.ai: GLM 5.2 — head-to-head comparison

Google: Gemini 3 Flash Preview profile Z.ai: GLM 5.2 profile All comparisons
Google: Gemini 3 Flash Preview — Google
Quality
#15 of 65
83based on 4 of 7 evaluations
Known Good Index
Speed
#63 of 345
119.2
Output tokens per second
Price
#297 of 526
$1.12
Blended per 1M tokens
In $0.50 · Out $3.00
Cache hit price
#163 of 412
$0.050
per 1M tokens (−90%)
Context
#120 of 575
1.05M
tokens (~1,600 pages)
Z.ai: GLM 5.2 — Z.ai
Quality
#8 of 65
91based on 3 of 7 evaluations
Known Good Index
Speed
#77 of 345
109.2
Output tokens per second
Price
#348 of 526
$1.78
Blended per 1M tokens
In $0.03 · Out $7.00
Cache hit price
#133 of 412
$0.033
per 1M tokens (−3%)
Context
#111 of 575
1.05M
tokens (~1,600 pages)
Summary

On the Known Good Index, Google: Gemini 3 Flash Preview scores 83 and Z.ai: GLM 5.2 scores 91 — a 8-point lead for Z.ai: GLM 5.2. They share 3 published evaluations, with Google: Gemini 3 Flash Preview ahead on 1 and Z.ai: GLM 5.2 ahead on 2.

Blended pricing is $1.12 per 1M tokens for Google: Gemini 3 Flash Preview and $1.78 for Z.ai: GLM 5.2 — Google: Gemini 3 Flash Preview is about 1.6× cheaper.

Throughput is 119 tokens per second for Google: Gemini 3 Flash Preview and 109 for Z.ai: GLM 5.2, with time to first token at 1.3s and 1.1s. Google: Gemini 3 Flash Preview accepts 1.05M tokens of context against 1.05M.

Google: Gemini 3 Flash Preview is proprietary; Z.ai: GLM 5.2 is open weights under Open weights (unrestricted). 39 tracked hosts serve one or both.

Generated from tracked data on 25 Oct 2026 · how these comparisons are computed →

At a glance
MetricGoogle: Gemini 3 Flash PreviewZ.ai: GLM 5.2
Known Good Index 83 based on 4 of 7 evaluations 91 based on 3 of 7 evaluations
Blended $/1M $1.12 $1.78
Output tok/s 119 109
Context window 1.05M 1.05M
Providers 2 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.

MetricGoogle: Gemini 3 Flash PreviewZ.ai: GLM 5.2
Known Good Index 83 91
Coding Index 72 —
Openness Index 5 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = Google: Gemini 3 Flash Preview · marker = Z.ai: GLM 5.2 · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond89 / 92
Mock AIME 2024–2596 / 86
SWE-bench Verified75 / 79

Right-hand figures read Google: Gemini 3 Flash Preview / Z.ai: GLM 5.2. Google: Gemini 3 Flash Preview leads on 1 of 3, Z.ai: GLM 5.2 on 2.

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.

MetricGoogle: Gemini 3 Flash PreviewZ.ai: GLM 5.2
Text Arena — 1,470
Text Arena (style controlled) — 1,475
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.

MetricGoogle: Gemini 3 Flash PreviewZ.ai: GLM 5.2
Input $/1M $0.50 $0.03
Output $/1M $3.00 $7.00
Blended $/1M $1.12 $1.78
Cache read $/1M $0.050 $0.033
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.

MetricGoogle: Gemini 3 Flash PreviewZ.ai: GLM 5.2
Context window 1.05M 1.05M
Max output tokens 66k 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.

MetricGoogle: Gemini 3 Flash PreviewZ.ai: GLM 5.2
Output tokens/s 119 109
Time to first token 1.3s 1.1s
The Known Good

Providers

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

39 hosts
Full provider benchmarks →
Provider Google: Gemini 3 Flash Preview blendedGoogle: Gemini 3 Flash Preview tok/s Z.ai: GLM 5.2 blendedZ.ai: GLM 5.2 tok/s
Google · first party $0.56 130 — —
Google AI Studio $0.56 107 — —
Decart — — $2.90 489
BaseTen — — $2.15 233
CoreWeave — — $1.07 208
Parasail — — $2.15 200
Nebius — — $2.15 166
Wafer — — $1.78 164
Reka · first party — — $1.60 149
Inceptron — — $1.04 129
Together — — $2.15 129
Venice — — $2.15 118
Mistral · first party — — $2.15 114
ModelRun — — $3.35 108
Ambient — — $0.95 101
Crusoe — — $2.15 100
Friendli — — $2.15 100
DigitalOcean — — $1.07 88
InferenceNet — — $2.08 87
SiliconFlow — — $1.07 82
Alibaba · first party — — $1.48 79
Makora — — $1.14 78
Relace — — $1.81 76
Baidu · first party — — $0.29 72
Cloudflare — — $2.14 71
GMICloud — — $2.15 61
Io Net — — $1.33 56
StreamLake — — $0.43 50
Z.AI · first party — — $2.15 49
AtlasCloud — — $1.44 48
DeepInfra — — $0.70 48
Morph — — $1.52 40
Novita — — $1.00 37
Sail Research — — $1.16 37
Ionstream — — $2.15 30
AkashML — — $1.18 27
Phala — — $1.70 18
Chutes — — $1.93 4
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 →